The most powerful argument I've had set against it is the ecological cost of refrigerating my ass for the next few centuries before (if!) I wake up again.

Is that a real argument? I'm not sure, but I thought I read somewhere that much commercial liquid nitrogen is generated as a by-product, so the ecological cost is pretty minimal.

(Of course, ecological cost is a dangerous route to travel if it isn't to be a full-time job. Leaving aside the obvious hypocrisy of anyone suggesting it while living a modern First World lifestyle, it's too easy to get wrong; for example, apparently a hybrid car is a massive net negative because it increases demand for heavy metal mining.)