I think this is an excellent topic -

by the time I figure out if these tables are either fishy or maybe a crew setting people up, im usually down 25% of what I brought to the table - I usually get away from these tables as quickly as possible - for example, when this happens on a 5/10 limit table I just accept that Im "actually" playing a 10/20 table, and if I had wanted to play a 10/20 table I would have joined that to begin with. Real loose tables just aren't my style..