I agree with this concern.
Even with some weighting for ‘long-timers’, 16x seems excessive.
The concern seems exacerbated by the idea of more active modeation
I’m not convinced that a forum being having diverse viewpoints already represented suffices to counteract this.
The distinction between modearting based on content and procedure (‘good discussion’) might be hard to uphold: disagreement on what constitutes a good argument is also important, for example.
The concern seems also exacerbated by a worry (which I tried to articulate elsewhere) of people established within the community possibly giving too much epistemic weight to someone being thus embedded.