Quote Originally Posted by Erpel
What we're talking about here isn't just LAG though - it's maniac really. I've read some articles from people saying that they like having a maniac on their left, because it gives them relative position in the hand. When the action comes around to them on any street with a hand they want to play they can just basically do a 'pass' - limp or check. Let the maniac do his thing and then when the action comes around to you a second time you can decide how best to play. It's like having the button on every hand, and most things you do close the action on that street.

That said, certainly - the things that annoy you the most when you play LAG - do them against them.
This. That's not a LAG you're dealing with, he is a maniac. Erpel's post is really good, it explains how you can exlpoit his play without having position.

I myself find it easier to play these guys oop. Sounds odd but I suppose it is easier to trap, and relative position as described by the other post is key. You can also be sure you'll have him raising too much, so you can set yourself up for a limp-re raise preflop to isolate him after everyone has called his raise. In position make your 3-bets alot bigger because everyone will want to get in a pot with him.