Almost never. Only times have been to gently remind folks who are just starting out on some of the unwritten rules like things that are frowned upon:

- Curling on the squat rack

- Doing sets in front of the dumbbell rack

- Using more than 2 sets of dumbbells at a time.

- Not letting others work in on machines.

But also encouraging reminders like

- anyone has the same right to the equipment as the strongest guy there.

- no one is judging you and most are happy help so don’t be afraid to ask for a spot unless the the person is wearing a hoodie and headphones.