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.

1. Does the pilot need anything but his personal biases to claim that poses a risk to the plane?

2. Because any rational person understands that we need to coexist in a society with a spectrum of political opinion, and that a fucking access point name doesn't cross the boundary between safe and dangerous to society.

3. Because doing it for one and not the other is obviously biased and arbitrary and demonstrates that it's not an actual danger to the plane, it's just some asshole with a bad day choosing to exercise his authority over someone whose politics he dislikes. To severe consequences to both that person and everyone else on board the plane. That's not a society you want to strive for.