How do you adjust for an uber-donkbettor?

[Ryno]

25-50 4-handed

I have position on villian. He is playing 60% of his hands, and virtually all BB hands (but almost never raises preflop). When the flop comes and he is first to act, he bets out 90% of the time. If he is not raised, he bets all streets like 80% of the time (but it took some adjustment to even know this). If there was a bet in front of him, he'd call with a pair or draw, fold other wise (even K3 pair of 3's in one case, all the way to the river).

Play more hands since he is playing junk? Play less because you're showdown committed if you call the flop? Limp behind to keep the pot small preflop so you can fold more safely postflop?