As an example, some parts of the internet ostracised Brendan Eich for a personal donation he made to support a Californian ballet proposition on same sex marriage; forcing his resignation. There were no complaints about any of his behaviour or actions at Mozilla whatsoever.
That's not a good thing to be doing.
As another example, the recent Stack Overflow changes where a controversial, over-empathsised policy change on respecting pronouns (also pretty much a non-issue, I have never seen pronoun complaints come up on Stack Overflow) has forced multiple community moderator resignations and a widespread community revolt.
These changes are often negatives for the projects involved.
Eh, there are. Just because you don't see it doesn't mean there aren't any reports.