You would left the rewards as they are now, maximum 5K, 2.5K, etc, but adopted a system of adjusting the rewards down/up based on difficulty/hashrate, with the current reward levels being the maximums, possibly it could alleviate some dumping.
Say a multipool wanted to mine because it was profitable at 5000, but then their hashrate hit the coin and the reward dropped to say 4000, the coin may not be as profitable and they would switch to a new coin (maybe)
If you throw 20gH at it, say with ASIC's, maybe the reward will drop to 500 or something, and they would stop mining.
I like the idea of a sliding reward value based on hashrate. When wafflepool hits us with 30GH like they have at times, it would be great if the reward dropped to 500 or 1000 coins, this would kill profitability for them.
I agree with Jesse Livermore, if we stop buying the dumps they will have to stop mining it. But that's not realistic, they would just stop mining it till people started buying again then they would jump back on. We need to look at real long term solutions here.
The idea of drop reward when big multipool hits the coin is not as good as it looks because the network can react only after the multipool mined some blocks. There is a time shift between the time a multipool starts mining the coin and the time of reward drop. Doing an intermittent mining, this timeshift can be exploited by the multipool to lower the average reward generating fluctuating block reward, and mine only higher reward blocks.
I thought many days about a way to discourage multipools but my conclusion is that the only way is the opposite: encourage the multipool (and other miners) to continue mining the coin, leaving the stabilization to the market.
I think that if the block reward would grow with the difficulty, the coin would be more stable. This cause an offer increase in the market, the price will adjust accordingly and the mining profit change, so miners and multipools can join or leave the coin accordingly. This is a longer cycle that can generate a smoother fluctuation. With actual fixed block reward we have a mining profit drop immediately after network power increase, without waiting for a price adjustment in the market, it is too fast, in my opinion this generate instability.
There are many possibility for incresing the block reward, but if the reward is proportional to difficulty we have a coin with predictable mining costs because the reward for a single rig becomes indipendent from the network power.
Or at least some interesting marketing ideas? 
