Being overly suspicious of everyone is a terrible way to live. Maintenance should have the autonomy to do as they did here - and security correctly followed up. The right response should only be technical imo. A meeting room should not lead to this level of network access.
- Love and peace, your neighbor on HackerNews
(which is to say, I think you know that you can be friendly without being foolish - but if not I'm going to really enjoy the gift of that credit card :))