Are play money tables "bad for you"?

[BrianBigNFun]

Sure it doesnt rot your teeth, but does make it for bad practice?

Once you fold the first hand because you have 4 idiots who go all in on the first preflop, Ive found playing mostly enjoyable. But I was curious if you guys think playing at play money tables makes bad practice.

I only play with money twice a month at personal 30 dollar tournaments with friends. (about 20 of us) and the occasional trip to AC. Although Ive made more money than Ive lost, Im the type of guy who only bets with money Im willing to lose. However, Im always looking to improve my game, is there any other to improve other than throwing your money into a pot?