I say this as someone fired for visiting it[1], and finding it impossible to get a job in the news industry a year later. Now, the news industry is hardly considered cutting edge, but people hear "now, the site has pornography, but-" and that's it. (Especially in this employer's market!)
Conversely, I applied to two tech companies over the past year, and being forthcoming as I am, I share this with them. Both were mystified at my being fired for visiting 4chan. ("What? Where do you LIVE?")
[1] I found out about the site from news coverage years ago (the NFL thing; "Don't mess with football!".) As Anonymous rose, it became interesting from a news standpoint. And yes, I casually just visited as well. I understand many consider this fire-able, and don't argue. That's kind of my point though, that divide.