While it certainly has the potential to be abused, the Concerned Citizen calls actually provide balance in my opinion.
Not so much about the fact that robbers may be taking too long or making too much noise, but in regards to the fact that a lot of the time, someone would be home.
Robberies that take place at 5 am server time are great because less people are online and there's less of a chance to be caught. However as someone mentioned before, most people aren't RP'ing in their homes as much as they'd realistically be inside of them, whether they're out RP'ing or just not in game. The chance that any robbery would be successful due to nobody being inside the residence, especially in the middle of the night, is exponentially higher on the server than in real life.
Breakin requests taking forever to get approved is one thing, but the owner of the property not being inside because they're offline or RP'ing elsewhere is almost a guarantee. Especially if there's no property alarm, it's quite literally a guaranteed win, unless of course there's nothing found inside the property. Concerned Citizen calls help to combat this.
It'd make sense for there to sometimes be a /do put out that someone walks by before the call is made, etc. If the MG of the "Concerned Citizen" name is a big enough issue, the caller name being changed wouldn't be a bad thing. I think the system works fine now, though.