Doesn't take a rocket surgeon to figure it out.
Crappy camera's, false sense of security with gates, easy to get in and out.
Some have paid off security guards that will pocket a couple hundred $$ to take a longer coffee break from their desk, but more often than not for $10/hr, they can't be bothered.
Not all condo's are created equal. The busiest condo's make the best target because traffic is constantly moving in/out. No one pays attention to a van. Just another soccer mom going about her day...