Yeah.....it's probably good to send those in for a re-grade, crossover, or CAC-ing depending on your intentions! I know a lot of folks do it, and 1 person I've seen did it with a hack saw, but I haven't tried that yet.
Sombody would buy 'em! Probablly put junk coins in and try to glue the clear plastic shell. I make sure they're separated and thrown in the trash though! A couple of those did crack clean, no damage to the clear plastic.....didn't think about it, but I probably should have made sure they were completely destroyed.
They do - http://www.anacs.com/Default.aspx?AspxAutoDetectCookieSupport=1 - scroll down and you'll see how to access it in the right hand column.