Stealing is wrong, and the thief bears the responsibility, not the victim. That said, the easier it is to steal something, the more likely it is to get stolen, and few crimes are easier that Porch Piracy.
My best friend through highschool and college had a really nice bicycle. After one year as a freshman, using the bike as his primary transportation in Seattle, it was no longer nice, though it still qualified as a bicycle.
Even when it was more effective at carrying tetanus than people, my friend carefully locked it up whenever he parked it anywhere other than inside the actual boarding house where he was living. Someone gave him a hard time about it once, and he said, “To you and me, it’s a crappy bike you wouldn’t want. To an addict, it’s a fix, and there’s nothing they want more.”
His point was proven when the bike got stolen. His lock didn’t fail. The bike was stolen while it was parked inside the boarding house. My friend theorized that the thief must’ve really been desperate to risk sneaking into a locked boarding house. He said this while we were in a room with several of the other tenants. They all agreed, a couple a little too enthusiastically for my liking.