I don't understand why people wear them inside (unless they are prescription and necessary or for those who have light sensitivity). They are called 'sun' glasses, afterall. But then I'm also a person who takes off my shades when I talk to someone when I'm outside. In reality, it's a small thing - to each their own.
I experimented with it in England and felt weird. -might have looked weird too, nobody in England does it, but, next sunny day and you're out, wear your shades because of the sun's bright, go into Tesco or your Post Office etc, just walk in, and wear your shades; don't even have to bother putting them on when you leave, just wear your shades - it's fun because you think people look at you but pretend not to notice, or people look at you and pretend to not notice, IDK, ether way it's fun -- though you feel kinda weird doing it.
If you’re wearing sun glasses indoors you look like an idiot. Just my opinion, no one cares if you’re high.
You should wear them as little as possible outside else you become one of those people who need to wear them inside.