I lurk the Gentoo IRC & mail (15+ years). I've never seen any systemd flames (not that they never happened). Gentoo IRC has always been helpful - even when I want to do stupid things.
Maybe we have different ideas of what constitutes flaming, but to me comparing somebody's choice of operating software to the "W-word", in a linux distro support forum, is about as inflammatory as it gets. Saying that systemd is insecure-by0definition is also quite rude. This is several years old, and I'm sure things have changed in the intervening years, but as a perfectly happy systemd user I can say that thread definitely left a sour taste in my mouth, at least initially.
[1]: https://forums.gentoo.org/viewtopic-t-1029642-start-0.html