Loose Blind Stealers

[TheDelChop]

Right now I am playing against a guy, who as the chip leader, is playing very loosely and stealing my blinds rather frequently. I would play back at him except that most of his bets are 25% of my stack and i feel that he wouldn't lay it down if I were to go over the top of him. I can't seem to find even a playable hand in any of these positions so what should I do? Just keep letting him take my money? Is there another alturnative?