As an example, tags for trolls and disinformation agents would not be able to co-exist with your criteria. If someone is deliberately spreading disinformation, such actions are dishonest, unacceptable behaviour. Accounts responsible should be tagged as such.
Egregious trolls should be reported to moderators. Red-tagging trolls just creates more drama and doesn't solve trolling at all.
If you insist on tagging liars, neutral tag should be enough unless they actually engage in deceptive
trading practices.