A table full of multitablers...

[Arnfinn Madsen]

I think what you mainly can take advantage of is that since you see them multitable, you can assume they are TAGs (since most multitablers are). If they neither know your style/abilities nor know that you know they are TAGs, you can get a decent edge until they discover.

[mshalen]

The first time I tried to multitable was playing three $100 PLO tables on Stars. I almost wet myself laughing when I noticed that 5 of the other players were at all three tables. I tightened up for a while but the game was so rockish that I went to play at another site.