I will leave another review about this site. Although NewGrounds does contain adult/mature material, the authors are required to leave a rating about their movie or game. If this rating is found to be incorrect or under-rated then the flash will be 'blammed' and removed from the site.
NewGrounds is a wonderful site and should be enjoyed by anyone and everyone.
Best site for flash contents, has some amazing collection of flash animation and games, but problem is site contains adult contents, though there is a rating for all flash - all those are easily accessible by anyone, so newgrounds not suitable for young people.
This is an excellent site for mature people... 15+. Obviously not suited because children have access to adult things such as pornography (animated/hentai).
Apart from the adult content which isn't blocked by age limits it is a wonderful site because it does offer what age limit should view the movie/game so that children do not watch it. The site contains no spyware because it doesn't have many downloads anyway...