And, do they hang up on you when you ask what company they are with or their phone number?

I'm on the Do No Call registry, yet I've gotten dozens of calls from this scumbag company over the last year.

Today I got another call. I kept the dude on the phone for a good 5 minutes before he asked if "this is about getting my number off their list" (at which point he hung up when I said "yes").

I found this via googling: http://www.ftc.gov/opa/2004/07/dmfs.shtm

What I want to know: does anyone know the actual company name? What can we do to fuck up these scumbags?