I've never really thought about it much before, but how many people come to their computer saying "I'm going to play some BP.net the video game, I have to get to a new reputation level!"?
Any system can be gamed, the one we have for reputation is fine IMO. IN GENERAL, people who get more thanks, answer more questions, post more pictures, and are well-liked get more reputation points (from what I can tell). On a forum, any reputation system really is just a popularity contest.
If anyone wants serious feedback regarding the possibility of spending large amounts of money on animals, there's better resources available. Not only that, but basing a monetary decision on some green boxes is silly, reading direct reports of interactions with sellers/buyers is the best way to go.
I need to drool over more snake pictures now, that's my favorite part about snake forums
ttyl.