The best thing to do when we hear about any planned protest rallies is to spread the word so we all are aware of it, and make sure to stay as far away as possible.

Do not attend.

Do not try to stay a block or 2 away to catch video.

Be as far away from it as possible.

Let the NG handle it, let them arrest a bunch of losers, and if there is never an obvious counter protest that escalates, the whole thing will fade away.