I think its better not to play any freerolls since its full of fish who will eventually outplay you with crappy cards so u will start playing with crappy cards also. I did that and i downgraded my gameplay big time in result im sitting here now trying to find a solution
i play freerolls (and micros) everyday on acr while playing cash tables, i do well at battling fish.
I am a tight/aggressive player. I always have position, I always have
equity.
i do get the occasional maniac donk who calls all in with T3o and flops a full house against my aces.
On the other hand, there is people that never want to give up their pocket JJ etc and lose to monster
hands at least a couple of times per tourney.
Make sure you have position and equity, then you will catch most of the fish.
they will call middle pairs all day, they never raise for draws, and even call raises for gutshots with 2 or 3 outs. Bluffs are useless against them because their understanding of technical gameplay is minimal, they'll call it.