Rude is stating I am not interested and have people badger you.
To me rudeness is getting hit up by every friend you have who moves into sales thinking that becaue you are my buddy I should do busuniess with you.
Rude could be every commercial you see on TV. Rude could be every advertisement you see in the peper.
There are definitely rude people but having someone introduce themself does not threaten me or annoy me more than a commercial on TV provided the person is professional.