May I ask what you're referring to here? What are newbies getting harassed for doing? Hopefully you realize that a lot of the newcomers to this forum are only here to make money from bounties and sig campaigns, and judging by the amount of ban appeals in Meta they don't seem to be reading the rules before they break them.
Yes, I probably don't roll out much in the altcoin announcement and bounties section and I guess you are relating your views to those section only. I agree they are worst to surf and I personally tend to avoid it due to ever increasing spam there. But some other sections on the forum like Bitcoin Technical Support, Development & Technical Discussion even meta have much of the newbies contributing in effective way. This proves that also majority of them come here to learn crypto or trade crypto.
If we want to have a forum that isn't clogged by nonsense posts, members like the aforementioned ones shouldn't be welcomed with open arms, because they're the ones responsible for how bad bitcointalk has gotten in terms of readability. And that small "group" on DT that people keep referring to tend to be members fighting against the useless spammers, account farmers, account sellers, and assorted scammers. They've also left a lot of accurate feedback in that fight, which IMO is a good use of DT "power".
Some of there feedbacks could be accurate and worthy. But I just want to let you know trust should mostly be used to related the trustworthiness and to let other know if the person is legit to put funds with or not. Catching spammers and shit posters or highly annoying trollers are not the once to be tagged or handled by DT and it later is pointed to an abuse of power its better to be handled by mod or staff itself and you know they are paid for that work.