Take from that what you will.
I'd say yes, legal, but dependant on colour and brightness. If you can turn it off / dim it, then it shouldn't be an issue.
Does that go on your permanent record now?
I.e. When insurers ask if you've ever had insurance declined / cancelled, you have to say yes and bend over?
Doesn't work for me
Tried it on 3 different browsers and my phone. Worked on all (and while not signed in).
Use this link, the one in the OP doesn't seem to work.