text: Under pressure from President Clinton , the leading theater trade association says it will now bar the under-17 crowd from R-rated movies ; rumors have it that the MPAA will be stricter about slapping R ratings onto violent movies ; Disney plans to stop featuring guns in its marketing materials ; and studios have canceled the development of some teen horror movies .
  
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  If kids under 17 see an R-rated movie they turn into homicidal maniacs .