"Signs painted on or near buildings/residences that are deemed to be 'easy pickings', so to speak. Also signs that act as warnings. For example, the sign for 'alarmed' looks like a W with a line drawn horizontally across the top, while a simple X could mean a good target.
This is true where I am in England, but I know not whether these symbols carry over to other countries.
*not a former burglar. I would be wealthier if I was. I would also have a cat called Dingo who would help me on my missions."
some urban legends you have lined up here but from personal experience i can say you want either cash or jewelery, everything else is to hard to take away or cant be sold and 90% of the Jewelery is fake too.
this changes of course if you are a crackhead fiending the next shot.