In Bristol, most mountain bikers do cross the Bristol Suspension bridge on their way home, same for a lot of the roadies. There's been a fair few cases of people being followed back by some teenagers and then having their bike stolen that night, so rather than go straight home (main roads), I just hit the back streets to see that it's clear. And now I make sure that we haven't left a set of keys out in the garden, even when the door is locked. Which was a fact on its own: it's an implicit metric of how often people try breaking in to an urban house here.