Checking the Blacksmoke timeline, the Stamps Of Mass
Destruction were officially "issued" in June 2003, while most of the cuttings
from Banksy suggest that he started defacing paintings around four months later,
with coverage of the gasmasked woman coming in 2005.
I
would say "highly inspired"... ;-)
who did it first?
http://www.banksy.co.uk/indoors/index3.html
check out the whole site:
http://www.banksy.co.uk/news/index.html