Make security "age restricted"

[BaneOfGiygas]

The ability to diversify your security forces is wholly dependent on how many people bother playing security that round, and you might as well toss a coin to determine if you're going to get an HoS leading a competent, effective team or some poor sap trying to pull the weight of the entire department on his own. In the case of the former, security can deal with petty crime just as well as antagonists, but the latter lone ranger will be lucky if he can deal with just the antagonists. It's hard to balance both scenarios out.