
I've worked in newspaper ad departments. From the point of view of the page planners (the people who stick ads in the paper) they're just spaces with serial numbers. You stick a 15 x 2 ad in on page 20, and that's all you know, rather than knowing that you're sticking a gun ad next to an article about a school shooting.
Of course, ideally you would check, but when editions are being closed late because of a big breaking news story or last minute advertising demand, there isn't time to thoroughly check the context of every ad versus the page content.
TLDR: It's probably some stressed newspaper employee on a deadline trying to fit ads into the edition without paying attention to where they are going to run.
( , Mon 17 Dec 2012, 10:42, Reply)