DT members really shouldn't be tagging members for being shitposters, because that's what the merit system is for, i.e., to keep them at a low rank in order to disincentivize them from posting for money.  That would be hypocritical of me to say back in 2017, because I used to tag shitposters by the dozen daily, but Theymos frowns on that now.

And deleting your own posts?  Unless you're doing it to hide the fact that your account was purchased and someone figures that out, I'd have to echo everyone who said here that you're not going to get in trouble for doing so.  Members might wonder why you're doing it if they even notice, but I don't think anybody should or will get negative trust for that.  There's no reason to do so that I can see.