Lots are noticing the similarity and it is being discussed on a few forums. The cover is not the only link:
"Here is a brief list of the people who are "on drugs" in Weezer's new video for the song "We Are All on Drugs": a pair of Jehovah's Witnesses, the paperboy..." - http://www.mtv.com/news/articles/1506594/20050728/weezer.jhtml
One person wrote " The album art is mimicking Jehovah's Witness propaganda art" which I liked.
Larger version of the cover can be found here: http://blambloozers.files.wordpress.com/2010/10/weezer-death-to-false-metal1.jpg