No, I don’t think it’s a good possibility. Let’s break down the what you’re describing:
- If there’s one person that has a personal issue with you, that still means that your posts need to be flagged by someone else who legitimately considers them flag-worthy before they get hidden.
- If there are two people that have a personal issue with you, that means that they need to be following you around the forums doggedly and keep flagging everything you write. Apart from this being improbable, it’s also something that mods will notice sooner or later. Funcom does notice flag abuse.
- If there are three or more people that have a personal issue with you, then maybe it’s not them, it’s you.
From what I can see, this is currently not a configurable option in Discourse, although I confess I didn’t dig into the actual source, mostly because I don’t have the time, but partly because I’m not really into Ruby 
However, feel free to request a feature.
EDIT: I just noticed that I didn’t actually provide the link to the Discourse feature request process. Fixed.