Personally, yes, it's bad for me. But that's more to do with me than it is the forum.
As an introverted guy who struggles to get girls and who has been without a serious relationship for 4 years, I have an interest in porn. The board provides me with greater access to content. There was a while when porn was eating up too much of my time and was basically part of my day morning noon and night. I worry about spending too much time with images and video and becoming even less likely to actually meet someone. I worry about desensitization, reliance, addiction.
I reckon I've got a grip on it now though. Although the only thing that helps me keep my slender grip on reality is the friendship I have with my collection of singing potatoes.