Den never struck me as a hacker. I've played with him a decent bit, and while he's good, it's not like he's ever swept the floor with me, headshot after headshot.

Only watched the first video since that's the one you said was most important (without sound, since I'm in a lecture class ATM), but since we determined that we can hear teleporting, it doesn't seem like he's hacking.

I'll check back and look at the other demos when I have more time, if you think it's necessary.