I was once in an environment also where EG's were the norm, and came to be expected by the guys. This changed when there was an incident at another unit, and the peer support guy who was supposed to be at work was well and truly gone. For this reason, along with unexpected peaks in traffic (caused by a million reasons, but most notably an IFER), it makes sense that if you are paid to be at work, then you sit in the rest room and see out your time.
When our "late marks" and "early marks" were stopped, I moaned about it to my partner, and her response as a nurse was astonishment that I was getting upset at being made to actually work my full rostered shift, and I had trouble arguing with her.
Anyway as I said, if you get them, appreciate it very quietly, and if you don't then realise that you have now joined the rest of the world.