My workplace finally got good at blocking imageboards. They blocked 4chan, 8ch.net, 8ch.pl, 16chan.nl, lainchan.org, bunkerchan.org, all of the nntpchan frontends, and even all the imageboards on this list (maybe that's the list they used). https://docs.google.com/document/d/1t10VI-sccy1CfAeMZHwmCS_7agIHFo_B5ipMjzsMtTg
The only imageboard they haven't touched so far is uboachan.org, and I'm afraid to use that now. They even blocked most of the english textboards (which there is little point in anyway, they're all dead except this one).
Anyways, due to my mania with 2ch-style forums, I'll problem spend some time here. I'm hoping they'll be less likely to block this site due to no pictures and no /pol/-esque threads.