The Farrelly Brothers, the Jackass boys, every contestant who's ever eaten an insect on Fear Factor... they all owe a huge debt to the schlockmeister who pioneered hard-to-stomach, in-your-face entertainment: Baltimore-based auteur/author/actor John Waters. Originally known as the director of campy, lowbrow flicks punctuated by gross-out gags (e.g., plus-size drag queen Divine eating authentic dog poop in 1972's Pink Flamingos), the 60-year-old moviemaker has enjoyed a more mellow image in recent years, thanks to a stread more