I block outright racists and obvious low effort idiots, but for the most part I tag people so I can see how often they post, or if it’s consistently in one direction or pushing an agenda. Right wing keyboard warriors of various stripes are the most common, but it’s handy to tag people on the far left, or really anyone too rigidly one-dimension.

Kinda like checking your sources for news and quotes I guess? If I know someone’s trying to manipulate me, I can form a more complete opinion and understanding.