yes, there are wetsuits to avoid - those not specifically made for scuba diving. There are lots of wetsuits made for surfing, etc. which do not have the gas bubble injection, they have air injection. Gas injection method is what gives the wetsuit its "spring" so it compresses at depth slightly then when you surface the bubbles spring back into shape. Most wetsuits made for surfing are air injected, warm at surface only, and will compress when underwater breaking down the bubbles. These suits will not keep you warm even at the surface after a short time of diving in them. Yes, the first few dives they will do fine, but after awhile they are nothing more than a skin protection. Body Glove and O'Neill make both kinds of suits so be careful which you buy. You best bet is to buy at a Scuba shop or if you buy online, buy from a shop that sells scuba gear.
Also, remember that all wetsuits compress eventually. A nice scuba neoprene wetsuit will need to be replaced after a few years of diving because even the gas injected bubbles will start to break down.
I hope this helps!
robint