Annodized aluminum- I'm assuming that this material is hardened in some way (annodizing?) that makes it safe to smoke out of since thats what you might see in some smoke shops, but they could just be bastards and not care for safety.

Yeah, I know. People are dumbasses which makes it so damn difficult to do anything pro-active. The best thing that could happen is for an addition to erowid or the lyceaum on the subject so if you feel inclined email them about it because this is definately something that needs to be addressed.