[Does so]

Exactly. Even if no one is home it does violence to your home and security.

Alinsky once said, he'd "...rather steal than get welfare".

Burglars are getting a perverse type of welfare, especially as they can commit multiple burglaries daily. (And that they get the advantage of a "first offense" plea as juveniles, then again as adults).

[Eagles6]

Yes, they are parasites that harm the host.