It would be a good idea. But also a practical one? How will you create the categories? This is not a democracy, so you may post and upload by the grace of the invisible leaders, and you are free to buy whatever you want at the mp as long as you don't use it. So what categories did you imagine to be necessary? I think these categories are already there. Only adapt them a bit. And give people the chance not to be confronted with what they prefer not to see. (someone else's cat or dog, madonna's with big boobies, poser and depression,...you name it) You can now already choose for, say, Poser and violence, or Poser and nudity, or Poser and fantasy, so if some categories would be added and a filter system activated, it would be easier. And then it would also be much easier because even thumbnails would not be visible for people not wanting to see that category. Pages would load quicker as less thumbs would have to be loaded etc etc...