This happens all the time, anyone can send anyone BTC for any reason, scripts go haywire, people copy & paste the wrong address, people send money "for lulz" and as someone else pointed out, to probe addresses to see if their alive, or to see if they spend that BTC in a joint transaction so that they can see other addresses that the person owns.
People come here all the time with wallets that need bruteforcing or to ask about money they randomly received, they're two very common threads, use the search or just browse the forum and you'll see.
Damn dude whats wrong with you? Take your meds.
The hypothesis that it was done to probe and track addresses actually makes a lot of sense, but it is also scary, because if that is true, then it means that someone is willing to spend ~80 USD just to be able to potentially track ~1000 of bitcoin addresses.
Am I paranoid, for pointing out, that even the ddos of mtgox was called "Bitcoin was hacked" in mass-media?
Am I paranoid, for pointing out, how much FUD and anti-bitcoin propaganda is in mass-media?
Am I paranoid, for believing, that since mass-media loves spreading anti-bitcoin propaganda, and has called ddos of one bitcoin exchange as "Bitcoin hacking", that they will also call bruteforcing of a bitcoin wallet as "Bitcoin hacking"?
Someone tipped over $4000 on reddit, in one tip. So yes, really.