There's always plan B.
Push every hand.
I see this more and more on the net, it seems to be the last refuge of the despondent, bad-beaten, or short-stacked. It can feel pretty bad, you've worked hard to outplay this guy, now he's creeping back up just by stealing your blinds. You have to keep a close watch out for it, it may not be blatantly every hand. If he's doing it one every 3 or so, he's all in with maybe any paint, any pair, maybe even any decent connectors. Once you're on to this, you're going to just have to take a stand. You're never that far behind in most races, at worst they're normally doubling up to only level. What are you waiting for anyway? If you're lucky you'll pick up JJ TT and even then you're not that big a favourite.
Be very very wary of the button limper, often they do it hoping you'll raise on that info alone.
Be very reluctant to give up your button.
Call every small blind, unless they are in total-maniac mode. In this mode, they often put you all-in just because you button-limped.