Jordy.......you pose a very pragmatic issue here.
The majority of differences of opinion are just that and are resolved without antagonisms or insults, but there are some that wait in the wings and continually snipe, ( could name at least four.)
What should one do?
If one has the conciliatory gene in one's chromosome make up, then it will be no big deal, let it go over your head.
If one hasn't (and i haven't) then if the attacks get abusive, slanderous and persistent then rules or no rules you must decide whether or not it is worth taking a suspension or even a banning rather than letting them run roughshod over you.
I would choice to take the latter.