Attempt to isolate with ...junk (3/6)

[pokerjunky]

I don't mind it every once in a while if like you say the BB is tight and the limper is one of loose passive types that calls the flop with anything then folds the turn UI. If he's the type to call down with ace high then this is just spewage.

I think your flop check raise was bad though. BB most likely has a decent hand, probably a pocket pair and the only thing that saved you was the ace on the turn. Otherwise you would have been in trouble.