I like using my long nails to pick my nose efficiently
Do other people look at you when you do this?
Yes, they always look horrified.
It's extremely impolite to pick your nose in public, because other people find it gross. If you want to pick your nose you should do it in private with no one else around.
And I think it's stupid to try to stop me from picking my nose.
Well it is just a little inconsiderate to the other people around you. Than the people have to worry about you touching things with the finger you use to pick your nose. Also, simply watching the action is enough to make some people gag.