If you leave someone a negative, and you're confident that you left it for a good reason, then don't even engage in these kinds of conversations. You'll learn that the longer you keep doing it, because you're always going to get PMs saying the same ridiculous things like:
Hello i want know why get red trust ?
why did you negate my trust ?
Sir The pharmacist,
Sorry I merited that person, I hope my red trust from will be vanish. My deepest apologies of giving that merit, and I promise not to merit anybody whose not deserving of.
Thank you..
And they know exactly what they're doing. They'll try anything, say anything, to get you to remove the red trust--except they never really learn what they did wrong, because they think selling merits/accounts/scamming/shitposting is all peachy, and once you catch them with one account, they'll create a new one and start the process all over.
But don't give up with your campaign against these people, because YOU are doing the right thing. They're in the wrong. Always remember that, and don't give in.