It's no great problem to ride clipless with regular shoes. On the other hand, at my university, I don't think I have ever taken a bike theft report involving a bike so equipped.

This may be due to the fact that most of our bike thieves go for bikes "secured" with cheezy cables, and most folks who ride clipless have better-quality bikes that they lock up better.

Never taken a report on a hybrid either; and very few roadsters. It's MTBs all the way with the trade-a-bike -for-crack crowd.