Ummm I lock my front wheel, my back wheel, my seat post, and my frame. Not all bike thieves carry all kinds of tools with them. Why would i want to make it any easier for someone by using quick release anything to steal something. Also things like quick release seat posts suck ass. My friends have some on their hybrids and the things slip like crazy. Ive seen several people over the years walking a bike home because someone snatched their front quick release wheel, but whatever feels good to u i guess.

Also I would never ride without the proper tools to fix a flat....I thought that would be a given. I dont own a car...so i kinda need my bike to get places.