One thing that has me stumped a bit about this whole issue is that I started another thread, in fact two, about similar issues in the past and those threads were quickly move to the off topic forum to suppress discussion. At least that is the only reason that seems to make sense.
Now this thread, which was created by someone else, has been allowed to flow on.
I think it is a bit of favoritism or bias that is shown.
As has been pointed out in this thread and others there are solutions that are simply not being implemented.
I participate pretty heavily in the Plex forums and Plex is MUCH more widely used and their forums are much busier but their instance of spam is a LOT lower. They use a system called "Discourse" which I really do not like much, they recently changed from something else, but even their earlier system was virtually spam free.
I think that Roku does not really care about having a good user experience on the forums while Plex, as well as Emby, Kodi and even BigSoccer, do care and actually try to make the user experience as pleasant as possible.
Maybe Roku is intentionally making the experience bad to drive away questions and criticisms. That has mostly worked for me as I do not post here much about issues anymore as I find the Roku forums pretty unpleasant to use a lot of the time primarily because of the spam and the lack of any real in depth interaction by Roku itself.
Would you feel better if Shawn moved this post to the Off Topic forum? I bet he will if you ask him.
As for the lack of implementation of additional measures to combat spam, yes, I agree, it seems to be a lack of priority on the part of Roku. Maybe they just don't have the bandwidth to put the focus here. Is it the current software, phpBB? Is it the server setup that prevents additional measures from being taken? Dunno. It's frustrating, and like you, one of the reasons I've not been around as much. I don't often have issues with my Roku, but I do think I could offer help to others. But this spam has been frustrating.
Roku definitely needs to do something, but I don't know what obstacles they may have created for themselves behind the scenes that make this harder. It's not uncommon, but it's really evident because of the large user base.
Roku should shut this forum down and start a new support offering.