I haven't seen an DT tagging anyone on the Livecoin campaign, or even suggesting that.
It will appropriate if DT's tag participant now.
My honest opinion (if that matters):
It matters. 
if you know that some service is Yobit-kind of shady or a confirmed scam and still think advertising them for money is ok, then I don't trust you. What else is acceptable for you if enough money is on the line?
Is there any difference if I wear their signature without receiving money?
So, am I not allowed to wear a signature of the site I love because they have a scam accusation?
Scam accusations doesn't prove them to be scam, and people think they didn't respond, of course they do, but you are just not satisfied.
Therefore, things should not be settled here, it should be in the court, tag should be "active scam accusation" or "shady exchange" but not a scammer.
But let's not focus on that since we have a scam accusation thread for that and we can never resolve that since it's a technical or probably a legal issue.
So, we know they are bad but we will keep giving them exposure, as if they are ok,
So other site I've mentioned aren't bad (red trust)? but we allow them to have exposure, that's fair because they are still operating and not proven to be a scam website at least at the court of law. because people need to do their research anyways?
Everyone does, DTs remarks are based on their personal opinion only.I will not be tagging participants for wearing or applying to the Livecoin campaign, but I will remove anyone from a campaign I manage who tries joining Livecoin and helping advertise the site. considering blacklisting them from my campaigns.
That's how a real DT think, you don't abuse your position to influence others, you always do the right judgement by looking at the big picture.
I think you'll tag participants if there's a warning from the legal authority that livecoin is scam exchange and they are conducting an investigation.
Guess what? Authority conducts investigation due to numerous complaints, not just of one person's.