To be honest I don't keep a list of examples, I usually raise an eyebrow and move on. It's typically on pages for smaller public figures where you get some extremely questionable descriptions.

It's also definitely a thing for contentious topics, a while back I tried to look up some info on the Gaza war and some of the pages were a complete battleground. I feel that there was a time when Wikipedia leaned away from using labels like "terrorist", but their modern policy seems to be that if you can find a bunch of news articles that say so then that's what the article should declare in Wikipedia's voice.