Your timeline would almost certainly be a little less stupid if you did that with gusto, but people who’ve disagreed with you can also post things beneficial to you or post insights you hadn’t thought of or post advice you’d find useful. I was a heavy RES tagger on reddit and I’d often come across well-meaning or useful posts and comments from people who’d been marked for saying jawdroppingly stupid shit about some other subject.
Edit: which mysteriously doesn’t appear to link on my end.
https://en.wikipedia.org/wiki/Demographic_history_of_Palestine_(region)