You know what, the hell with it, 3/2:
You want to boost something that's witty or clever or just depressingly appropriate and the author hasn't tagged it?
I get it, but it would be great if we could treat it like we do images with no alt text: Push back. Let the person know "hey, this is really cool, but I'm making the choice to care for the folks downstream of me by not boosting stuff without tags and/or CWs. Can you do me a solid and put those on?"