I don't want anyone else gaining access to my room unless I authorize it. I'm sure that I don't have to lay out the possibilities, do I? OK, if you insist. Here's just one:

Professionally dressed woman appears at the front desk, convinces FD agent that she's my wife whose flight was delayed and is given a key. When I arrive, I get up to my room to find her and an armed compatriot who relieve me of my valuables.