Buying ASIC miners goes against the common good. It give an individual the upper hand for a while until most miners upgrade to ASIC. By that time, a 5Ghps miner will give the same a amount of bitcoins as a 200Mhps GPU miner gave 6 month before.

In the long term, we all loose and the only winners are the ASIC manufacturers.

This is a fine example how group behavior eventually goes against the common good.

But I guess it's too late for that now... the hash rate snow ball is rolling faster and getting bigger by the minute.