i like your forum 
give it time. people often lurk for a while before engaging. you may also want to have a specific category for more “controversial topics”. i know from my admin experience that in such cases where social movement discussions take place, people often want those more difficult topics. unfortunately those can take moderating resources. starting a forum community from scratch and building content can take time and patience. it looks great so far.
i am also wondering if the TZM name may be factor in how it’s being seen in links, since TMZ is uhm, such a thing.