I have zero problem with McCrorie going to the game. There's a video of him joining in with the bouncy though which I would say is just fucking stupid - not because I don't think he's allowed, but because it's just asking for abuse, and he'll be a target now if he has a poor game against Rangers in future.
If you're going to go to the game and be in the public eye, then be sensible about it.
What perhaps is interesting is McCrorie can be in the middle of the Rangers end and presumably get no abuse. Wonder what the reaction would be if Scott Wright rocked up in the Aberdeen end for a game...
I'm old enough to remember (fuck sake Rico) David Robertson having to be escorted from the Aberdeen end and given a seat in the Celtic end at the 94 LC semi due to getting pelted with coins and spat at.