As a kid, a slightly distressing part of Star Wars was R2D2 getting zapped by a band of cute but spooky-eyed scavengers who kidnap and sell robots for spare parts!
Robots may survive in well lit, surveilled streets of Earth's cities, but they won't need to wander as far as outer-rim desert world of Tatooine to get into trouble.
A situation much like the early days of network hacking, but in the real physical world is latent. Despite benevolent anthropomorphism, robots aren't much loved by humans. They're packed with valuable electronics. But much more fun... they can be captured, hacked to perform the bidding of a new master and released back into circulation. Iran capturing the RQ-170 stealth drone in 2011 was almost inevitable but portends a new frontier in digital defence in physical space. Ultimately this leads to robots that can "defend themselves", and so to the obvious escalation of force between humans and machines.
For this reason I predict that, like domesticated dogs, robots have limited room to rove, close to protective masters.