I think GP's point is that it's not a risk to the plane? Or in what way is it a risk to the plane? If passenger(s) are wearing a super pro or anti Biden or Trump shirt or Bluetooth/SSID name, is that a risk to the plane, as what if there are other people on the plane who feel strongly in the other direction? But if someone really is OK with pilots turning around flights because of such shirts, etc., then wouldn't the better solution for airlines be to ban clothing, stickers, military uniforms, etc., that have countries' flags, candidate names, political slogans, etc. on them? As if someone believes that turning around planes over it is reasonable, better to address that 'problem' even before taking off and costing large amounts of money and time for hundreds of others, instead of based on the whim(?) of a pilot hours into a flight.