Not to excuse MN but to explain: The actual ads you see are not selected by MN, they come as part of a package deal from advertising companies and are handled by those companies. Sometimes those companies deliver shit antisocial ads like this. Sometimes those companies also aren't aware, having had the bad ads delivered from another ad company they're partnered with. Yes, it's utter rubbish and leads to us getting crap like this and ineffective response from MN because they can't directly stop it.
Once a company signs up to include ads supplied externally, they've got a deal with the devil that they can't control.