A user has a mixer or gambling in their signature space does not automatically mean that all their posts have to be related to that signature space.
If you were observant enough to note the way users post and what each boards are used for then you won’t have created this thread of yours. We have bitcoin discussion board which is for all topics related to the general aspect of bitcoin or any thing concerning bitcoin but if you’re interested in knowing how bitcoin works then you should locate the technical boards. While for gambling discussions it has its own board and sub-board for that. So I don’t see how the signature an user has on will affect their discussion here in the forum.