OK, I have ugly bikes because they're 'put' together from craigslist and dumpster finds, and live in suburbs where folks just throw their bikes in the dirt next to the store and don't hear alot about theft. BUT I have heavy cables and kryptonites which I switch back and forth.
My most concern is when I have the bikes on the back of my car in a strap-on rack and have to pit stop or whatever and out of sight of car. No lockable 'hitch' for my little car and bikes don't fit inside. So I just lock them all together in one big 'lump' of bicycles when I have several to make it hard to handle. But with a single bike, locking it to itself and the fold up rack**********??? Not quick release hubs so removing wheels is inconvenient.
Anyone else have this concern?