Wait what? Why the fuck are we all talking about stickers now? That had nothing to do with the original complaint / topic of chain DMs. My two cents:
1. I don't care about reaction score beyond being able to easily identify a sperg that doesn't have the triangle of shame yet. I could easily do without it.
2. Notification alerts serve a utility in easily seeing how posts made are taken. Like it or not, they serve to correct shitty behavior in normal users. "Why is what I said retarded? Why do so many people disagree with my take? Hmmmmmm.... Oh. I suggested we call CPS on that user. I'd better not do that then."
I didn't see the initiating post going through the highlights, but it seems like a fun site feature that has some utility in how users interact is being yoinked because a handful of spergs take it way too seriously.