Ethics of Shortstacking the 2k

[ahnuld]

Wondering what you guys think of this. I know alot of people who are 2k regulars hate people who do this (buying in for 400 and cashing out when you double up, then buying in short again) but it is very profitable. It is so easy to wait for a good hand like AQ+ 99+ or even 77 in some spots and move in on a lag player or move in when someone raises and gets a few loose callers.

Is this ethical? I know its poker and you should do whatever you want within the rules of the game, but I feel bad screwing up the game for the guys who are trying to play normal 100bb+ poker. Id like to hear some opinions.