DD may have potentially saved some people... especially teens in the 1980s and early 90s when most people at that time were doing... 
drugs/alcohol/cigarettes  
selling drugs 
joining gangs 
unprotected sex (therefore getting AIDS)
gangbanging 
hustlin' 
pimpin' 
....and various activities like htese.  
As long as geeks do their "thing" (be it playing D&D, doing computer programing at home, cosplaying, going to Star Trek conventions 

) and do well in school... life's good.  I would rather see these people exercise their brains with DD than let it waste away by doing the activities mentioned above.
PS: My anti-drug during the 90s was basketball.  To me it served the same purpose as DD.  I studied and applied some of the signature moves from Magic Johnson, Dr J (Julius Erving), Larry Bird, and Michael Jordan in my play 

And lasz~  I can't believe this guy... still insisting that anime/manga is "akin to pedfiles".  Anime and manga is simply a Japanese Entertainment-Industrial Complex that serves the same purpose as HOLLYWOOD.  You've been debunked many times over this.