1. Register an account at IMDb, so you can post in the forums.2. Go into any popular, or recently released movie.3. Make a thread with the topic "This movie is a total ripoff of...", insert any movie, whatsoever, in place of the ellipsis.4. Watch them start fighting with one another for fifty pages.(Note: If one of your threads doesn't work, make another one, with a different movie, they will not remember you made the last one, because most IMDb users are retarded.)
For extra lulz, visit forums related to shit bands such as Greenday or Fallout Boy. Saying anything that isn't along the lines of "OMG BEST BAND EVAR!!!" will result in the butthurt of many 16 year old girls and many pages of fun at the expense of others.
