Well things change when you reach peri menopause, same as they do during your cycle, during pregnancy, at puberty.
I do agree it's not an excuse to behave like an arse and expect not to be confronted about it, efforts should be made to control and monitor it because taking it out on others isn't acceptable.
There was a thread a few months ago about a woman who was maybe in peri who was awful to service staff, by her own admission. It annoyed me that the peri was used as an excuse for how she behaved, and wasn't really seeking to change that, because as someone also in peri, but in a service job myself, it would never be tolerated the other way around. I would be expected to deal with how I felt myself, seek help, do something about it, get a different job etc etc, and it would be extremely unacceptable for me to do it, peri or not. So yeah, there's times people use it as a way to excuse behaviour they know is unacceptable. The behaviour and reason for it are the same, but it being acceptable seems to depend on who it's aimed at.
The thread you talk about is to me, just someone venting, she's not actually going around knocking caps off people's heads, she's not taking it out on other people.
There's a difference between feeling and discussing these things that give you rage when they were mildly annoying or didn't even register before and that peri menopause can cause those feelings, and using it as a get out of jail free card to abuse other people.