[dhimes]

People reading an article about a tragedy are no more likely to be interested in background check services than the population as whole.

Are you sure about that? New mother, wondering where she is going to find a babysitter, wouldn't feel an increased pressure to think about security cameras and background checks after seeing something like that? I can't speak for all of them, of course, but of the few I've known such things become topics of neighborhood conversation. Perhaps you have better data.

[TeMPOraL]

I suspect parents are a particularly juicy target. Being a fresh parent myself, I've already noticed I have much different emotional reactions to news reports and even movie scenes involving safety of children.

I totally buy that in the above murder example, an ad for security cameras would be very effective.