I've never seen Reno 911 as such, since I don't get Comedy Central, but it's apparently a very subtle parody of COPS and other such police reality shows.
Well I just found a link to this gem that will, if you have any knowledge of Dungeons & Dragons, put a big smile on your face. The fact that it's played in a completely straigth manner just makes it even more hilarious
http://gorillamask.net/bootsofescaping.shtml---
"With the first link, the chain is forged. The first speech censored, the first thought forbidden, the first freedom denied, chains us all irrevocably." [...] The first time any man's freedom is trodden on, we're all damaged. - Captain Jean-Luc Picard
B*tch, meet reality. Reality, meet b*tch. - Me