Well, if this is implemented then there would be a problem with it and I think someone will surely take advantage of it and abuse it to demote or demerit if it's about demerit button like they just don't want that forum member to rank up (there are good points to this though it's already a different topic so I won't delve further into that topic). Let's say it is implemented then I could just use it to demote your accounts or demerit your accounts if it is about implementing demerit button. What do you think what will happen to your accounts especially your account having negative trust already. For other forum members who already reached legendary rank and didn't start from newbie with merits required to rank up then it is because they are much earlier to be here in the forum even though they aren't posting high quality posts (not all though because some are even contributed to the forum). Anyway, if that really happen then all your accounts would be newbies right now and with negative trust score.