Network downtime this morning (for essential maintaince): 30-odd minutes
Time between network comming back up and some bright spark noticing that they didn’t restrict net send to administrator use only: about 30 seconds
Time between above and first message being sent by users: about 30 seconds
Time between above and first silly message being sent by users: one New York second
Time between above and someone being offended by some silly message: about 10 minutes
Speed of news of complaint reaching managers and then IT dept: c
So, net send is now restricted again.