JollyGood seems to be targeted a lot by Newbies and junior members. I don't have to state the obvious: these accounts are (most likely) alts of tagged members or members in a signature campaign who don't want to reveal themselves or the accounts with some reputation and can't risk saying it from the main.
If there's a possibility that these accounts don't fall under the categories I've mentioned (Which is very low). In that case, I don't know how they learned so much about the forum in such a short period, being these low ranks and having recently registered, disregarding the possibility of them not being alts.
The likelihood as you pointed out as being more than one account operated by a single puppeteer is the first that comes to mind. There must be something else going on if these relatively new accounts are excessively complaining about a neutral tag. Maybe they are being used sporadically while the puppeteer is consolidating other accounts, maybe it is a different reason but it does not add up.
Why create a thread that goes on for several pages without writing anything (besides the OP) and not steering the discussion in the right direction. I don't see someone like that as being a genuine user. If you are with a group of people who are speaking about a topic that you brought up, it's only natural that you would participate in that discussion and say something from time to time. You wouldn't just grab your stuff and leave, would you? Act the same way here.
Genuine members behave in different way to what the OP has been doing. He seems to have applied more energy in posts related to his neutral tag than he has throughout the lifetime of his
Familian account.