In the time I've been on here, I've noted that Hubber Ghost32 seems to have a really good approach to dealing with those you describe. He'll usually allow a comment like that from someone once, but with a warning that future comments of that sort will be deleted. If the commenter crosses Hubs (he writes a lot), he'll sometimes delete the first occurrence on a Hub, again with a warning about it, and invite the more intelligent discourse that many of us here seek.
If my recall is correct, Hubber Cardisa offers advice on a number of different topics like this. As a HubPage Elite, I expect the advice she offers will be consistent with policies for the site.
Ultimately though, how you handle it is mostly your choice, and will become part of who you are and how you're perceived within the HubPage community.