id say that snot rockets are pretty gross. i mean at least with picking there isnt much room for error. its not like blowing where it could hang on and swing around or anything. unless... naaww i wont go there.
I knew this girl in high school who was very fit and ran cross country and played soccor...she used to blow snot rockets while running. She's like, well if my nose is gonna run and I end up choking on it, I'd rather blow a snot rocket. I guess whatever works!
Personally I think it's grosser to pick the nose in public than to blow it. But like others, I dislike blowing my nose infront of a lot of people. Especially in class!