This seems unrealistically convoluted, to the level of someone who’s just looking for evidence of a conspiracy. A gang symbol is a bit rubbish if you need a cryptography manual to identify it. The whole point of a gang symbol is to advertise that you belong to the gang.
You could probably find a trifecta of 3s and link him to the Illuminati if you tried hard enough.
If you were powerful enough, sure. The court is only as strong as its ability to enforce a punishment.
The president is exempt from criminal prosecution for things they did as part of their duties, and if no-one is willing to impeach or impose other punishments, they can be as contemptuous as they like. How would the court stop then?