Take a look at the government's latest attempt to scare children away from cannabis: http://www.abovetheinfluence.com/stoners/.
The site does convince one that marijuana decreases intelligence -- in drug haters.
Please, send every American to this site. After all, it was paid for entirely by your tax dollars. Remember that the next time you vote for someone like Alaska Sen. Ted Stevens or California Rep. Randall "Top Gun" Cunningham, who treat our government as their personal cash cow and set up fake "wars" so their friends can also enrich themelves at our expense, this is what you are getting for the money.