Sick of people driving at night with high beams on. Do you think it’s a good idea to cover the back of my car with reflective tape? Is it legal, obviously asking for a friend.

On an old Porsche 944 I had years ago, I had Cibie H4 reflectors replacing the stock sealed beams, and a 12AWG relay harness wired direct to the back of the alternator, and a Transpo voltage regulator that was adjusted to \~13.7V (why German cars of that era ran their alternators at such low voltage I do not know.) I installed some 60/100W off-road bulbs in them (a regular, legal-in-Europe bulb would be 55 watt low beam, 60 watt high beam) which was the only part of this modification that would have been illegal in a European country (the headlights themselves are only legal for motorcycles in the US because of reasons that make sense to nobody.) The main reason for this mod was a) the stock wiring was causing over 1V drop from the alternator to the headlights and b) at the time, part of my commute was on a completely unlit, windy 2-lane road. After finishing this work, I was no longer limited by how far I could see, because I could never not see to the next corner. This is the only car I've ever driven where a quick flick of the high beams would encourage an oncoming Maryland driver to dip their headlights. However, on low beam, they were less glaring than the old sealed beams because of the sharp cutoff of the ECE beam pattern. Really a nice setup and because I wasn't a douche and didn't deploy the brights in public, I never got hassled for it in the \~7 years I drove that car daily.