(a) we have two useable choices with inappropriate post content -
(i) ban the user .. usually overkill
(ii) edit the material .. which fixes itinerant problems
(b) time and workload doesn't permit too much in the way of admin niceties like exchanges with individual posters on such matters
(c) the mods determine whether content is OK or not
.. that's the way life is, I'm afraid ....
JT