After I sit at a table if in the first 20 hands i'm not looking at 2 $bags, 2 fish and 1 smily face I start to get leary. Especially if the table is under 30% PF. If I see 2 or more of any taz, frowny faces, bombs or rocks I'm out of there by the next orbit. Unless I have position imidiatly to the left of a giant fish then I'll wait till he leaves.