Boiling will kill them, but if they are at all like Ascaris eggs, they are practically immortal. They can survive freezing, acids, 50%bleach solutions, practically anything. They can be filtered though. Chemical treatments are usually targeted at bacteria, which are usually much more of a threat than cestodes or helminths.
Thanks for all the info!
If they do, can't say I'd blame them. They've certainly earned that right.
don't do a google image search of Hydatid Cyst
Thanks for the warning. I almost lost it several times in the Tonsilith topic. I'll resist the urge to look!