To get rid of these junk "password testing outputs" don't create yet more outputs, here is how you make a transaction to defragment the utxo set:
For this game we'll need a copy of bitcoind or the bitcoinqt debug console. You don't need a synced up blockchain, unless you're going to use it to look up the scriptPubKeys, and if you are you'll need the node to be running with txindex=1 in the configuration. You'll also want
this patch so that you can relay OP_RETURN transactions, and a configuration which addnode=173.242.112.53 and addnode=relay.eligius.st to make sure the OP_RETURN transactions get relayed to someone who will mine them.
First figure out the txid:vouts you'll be spending.
Then run
$ bitcoind createrawtransaction '[{"txid":"50bb362e201ed2246a415dad53f63cbb41b88c145ea7a41ee111b9e4353f80f5","vout":224},{"txid":"dda2e022a81ac6dcc219bd1a8bc7038bf55f5039b8a74a78ac473b6b32a5d146","vout":414}]' '{"1GMaxweLLbo8mdXvnnC19Wt2wigiYUKgEB":1e-8}'
The destination doesn't matter as you'll see in a moment.
This will return:
0100000002f5803f35e4b911e11ea4a75e148cb841bb3cf653ad5d416a24d21e202e36bb50e0000 00000ffffffff46d1a5326b3b47ac784aa7b839505ff58b03c78b1abd19c2dcc61aa822e0a2dd9e 01000000ffffffff0101000000000000001976a914a86e8ee2a05a44613904e18132e49b2448adc4e688ac00000000Which is an unsigned transaction in hex. I've bolded the two parts you need to modify by hand:
(0) The "1" which is the value of the output in satoshis, the number is little endian which is why most of the 0s come after it. Change that 1 to a zero.
(1) The long part beginning with 1976a914...88ac. This is the scriptPubkey that the transaction pays to. We replace that with 016a which is a 1 byte script (thus the 01) containing OP_RETURN which is the 0x6a opcode. This tells bitcoin to not save an output to the database.
With these two modifications all the coin value gets consolidated into the miner's fees and the global bitcoin database is cleaned up:
The result is:
0100000002f5803f35e4b911e11ea4a75e148cb841bb3cf653ad5d416a24d21e202e36bb50e0000 00000ffffffff46d1a5326b3b47ac784aa7b839505ff58b03c78b1abd19c2dcc61aa822e0a2dd9e 01000000ffffffff010000000000000000016a00000000Which we can decode:
$ bitcoind decoderawtransaction 0100000002f5803f35e4b911e11ea4a75e148cb841bb3cf653ad5d416a24d21e202e36bb50e0000 00000ffffffff46d1a5326b3b47ac784aa7b839505ff58b03c78b1abd19c2dcc61aa822e0a2dd9e 01000000ffffffff010000000000000000016a00000000
{
"txid" : "b147506ef23be7c7e8e0169b0aadf0bd1942d8acb9e31b48b0a1b904bf15425e",
"version" : 1,
"locktime" : 0,
"vin" : [
{
"txid" : "50bb362e201ed2246a415dad53f63cbb41b88c145ea7a41ee111b9e4353f80f5",
"vout" : 224,
"scriptSig" : {
"asm" : "",
"hex" : ""
},
"sequence" : 4294967295
},
{
"txid" : "dda2e022a81ac6dcc219bd1a8bc7038bf55f5039b8a74a78ac473b6b32a5d146",
"vout" : 414,
"scriptSig" : {
"asm" : "",
"hex" : ""
},
"sequence" : 4294967295
}
],
"vout" : [
{
"value" : 0.00000000,
"n" : 0,
"scriptPubKey" : {
"asm" : "OP_RETURN",
"hex" : "6a",
"type" : "nonstandard"
}
}
]
}
Now this just needs to be signed.
To sign it we need the scriptPubKeys and the private keys.
To get the scriptPubKeys you can run:
$ bitcoind getrawtransaction 1 | grep '"n" : ,' -A 3 | grep hex
Substituting the txid and vout.
All said and done, we sign our transaction hex using the scriptPubKeys and private keys in an
$ bitcoind signrawtransaction 0100000002f5803f35e4b911e11ea4a75e148cb841bb3cf653ad5d416a24d21e202e36bb50e0000 00000ffffffff46d1a5326b3b47ac784aa7b839505ff58b03c78b1abd19c2dcc61aa822e0a2dd9e 01000000ffffffff010000000000000000016a00000000 '[{"txid":"50bb362e201ed2246a415dad53f63cbb41b88c145ea7a41ee111b9e4353f80f5","vout":224,"scriptPubKey":"76a914f2b461e18eaeeb834e8964a0f6f46abfa5a493cf88ac"},{"txid":"dda2e022a81ac6dcc219bd1a8bc7038bf55f5039b8a74a78ac473b6b32a5d146","vout":414,"scriptPubKey":"76a9146adad08db0e0169c5db5b232e0cbe46af4e27fe288ac"}]' '["5KR8CRg662edTqU4AmPKEAVbg8Qj9RA1WbY6MNzb64T4kAyzDLV","5KjV1dJE58aFPB5HvTs8nbuQe8r8fUvHFEh3Pu8hQ8A7qSChEsi"]' "NONE|ANYONECANPAY"
The final "NONE|ANYONECANPAY" uses the none and anyonecanpay sighash flags so that in theory the miner could merge this transaction with other cleanup transactions, it basically creates a signature that gives away these coins to anyone. You DONT want to use that option on normal spends of your own coins.
Which will return:
{
"hex" : "0100000002f5803f35e4b911e11ea4a75e148cb841bb3cf653ad5d416a24d21e202e36bb50e0000 0008c493046022100fd91365fb7b652676a9baf0ff38970fc4adef66dc0d481985ad8ccd85a6762 6b022100b9c801ea7ed0efc93fa6f95d60cff4dbf476f276d80fdfa11e57356ddf46be928241046 a69146ba92ba33073caa21e74ebdc630813c9062281807ca6071bf6a83818ba8daa3836857154cb 6d7e036c9e36d1f67e75a5327b80b34761fd434ee067c61bffffffff46d1a5326b3b47ac784aa7b 839505ff58b03c78b1abd19c2dcc61aa822e0a2dd9e0100008c493046022100d4661ae28ddf7604 986b86de06b945600ae059a123c5c791202bdc63da4b7e6a022100a1ea94cacd5fa97f2435137da 8665fbd952507ad22e727567b3fb7fcdaeeb4348241040ace5fddc113ff9689496ea9abc30620d5 b032286df28e1a20cfeca112cf1c27050dacbc9de5dced5803b2d221f1c5163e4f0556b1f48e631 9cb2351dc3b347bffffffff010000000000000000016a00000000",
"complete" : true
}
And the complete says the transaction is ready to send.
You can send it with sendrawtransaction
If you don't want to go through the manual hex editing to get the transaction made into an OP_RETURN, then at least please groom up multiple of these outputs into a payment to yourself... the dust does you and no one else any good.
Congrats, you've now defragmented the Bitcoin global database a little bit. Have fun. 
