I neglected to mention web-based proxies as an easy way to bypass that filter. A Google search for something like "free anonymous web proxy" would work.
I also neglected to mention that here's a reason they put those filters on. Even if I don't agree with those reasons, your employer likely does, and depending how closely you're monitored, people might not look kindly on such circumvention. But, honestly, if you only use it to look at pictures on this forum, and you already look at this forum, there's really nothing extra you'd be doing wrong.
Point is: stupidly easy to bypass these kinds of filters, not that you necessarily should. It's what I'd do, though.