So negative reinforcement here is the negative opinion about someone so that they would stop doing something. Taking away their “credibility” so that they would do something else.

Positive reinforcement is giving credibility to people who are doing something worthy.

Negative reinforcement is defined by taking away an adverse stimulus. A positive attribute (like credibility) does not count as adverse.

Taking something good away is negative punishment. You are removing something they want, to reduce (punish) the behaviour (not reinforce it). Classic case is taking a kid's toys away when he won't behave.

Of course, these things are mixed. If receiving bad comments online is hurtful, then that is positive punishment. The removal of credibility is an added sting.

Positive reinforcement is correct in that example yes.

I've been involved in dog training where some people are really into this, while others twist the concepts to suit them, so getting it right is a bit of a personal peeve.

Yeah, that's great that you have pointed that out, but it doesn't take away from the main point I was making unfortunately. You could argue definitions, but if you truly know that I am making this mistake, then you should explain the mistake of vocabulary rather then then essence of the point being made.

What you're doing instead is diverging the conversation towards a topic that is unrelated to the subject; while in the process satisfying your own ego.

And yes, I meant "negative punishment" vs "negative reinforcement".