Stop spamming you jack*** !

You could delete them.

But you could also respond with a human touch. In the history of business, many a complainer has been turned into a buyer by a company actually taking the time to listen and respond.

Something like, "We asked facebook to show this ad to to people who like renaissance festivals, because we really think if you like renaissance festivals you'll like our huge turkey leg lamps. You do like renaissance festivals, don't you?" and see if they reply. Might get a conversation going, in which you'll woo them over with your charm, and pretty soon you'll have a new advocate singing the praises of your lamps all over facebook! : )

...and if not that person, maybe some other person who sees you treating their friend with dignity and not scorn.

OR look at maybe changing your ad targeting. If your target audience is not inclined to want ads in their newsfeed, maybe you don't want to piss them off and have your brand associated with interrupting their facebook fun.

Great thing about ad comments, though, is that they're not readily visible, right? : ) Someone seeing the ad in their newsfeed would have to click on the little comments icon to open them up, and even then only a few "Top Comments" show at first.

Usability studies show that most people do not click on ad comments unless they're about to leave a comment - and don't realize they can select "Recent Activity" to see all the other comments.

So you're probably safe ignoring them or deleting them. But responding may actually get you a better return.

This is kick off answer. Just ignore it don't react on this...