Yeah I can attest to that. One time I had to pay a tax and I went to the bank to deposit some funds and suddenly the clerk didn't like 1 or 2 of the banknotes because they were too crumpled or torn almost half way in. Fortunately I had a surplus of cash with me so I could get it done
![Grin](https://bitcointalk.org/Smileys/default/grin.gif)
Anyway I think there are better methods to promote Bitcoin like perhaps giving leaflets to customers at your workplace or putting up Bitcoin posters around town?
By the way the idea to use throwaway email accounts to send Bitcoin promos to random people may backfire because generally the emails will arrive into people's junk folder and they will delete anything with 'free money' in the heading on sight I think.