people rarely enforce the rule because it's rarely broken. and this is not one of those rare occasions.
"say your friend is wearing a wool sweater, so you start calling them a sheep. If the friend asks you to stop and you don't, it's crossed the line from being a joke into being bullying."
No, we're making jokes about the whole community. It's not one person we're making fun of (well, we are calling you in particular a snowflake but that is besides the point). And it's for everyone to look at, not just you personally. Equal jokes for everyone.