Then that is something which was brought to the staff's attention and dealt with via a warning on her profile to not do that again. If she does, further action will be taken. The profile function does use "report" if need be and if you happen to come across something which is really out of order then it needs to be reported.
We have no power over what someone posts until they post it and get it reported. If nobody tells us, we don't know - we haven't the time or resources to trawl through 6,000 profiles and every conversation within them so we rely on members to report things if need be.
Problem is, people retaliate on profiles and before too long, everyone is hurling abuse to the point where nothing can be done apart from letting it run its course. More often than not, after these epic-style arguments, people are still on each other's buddy lists and chatting.