It is quite possible that the number of incidents of Samsung 7 phones catching fire / smoking / exploding is noticeably higher than any other models. It may even be ten times as high. That number would still be ridiculously small, compared to the number of devices sold (which work perfectly fine and will never catch fire / explode).
The point is, people with normal reasoning can figure out that, while these incidents make the news, they are totally inconsequential and the likelihood of any tragic consequence as a result of a Samsung phone exploding is much smaller than likelihood of getting poisoned (and dying) by a Big Mac. Yet, we'll never see a recall of Big Mac.
None of that matters in this case, though. The sequence of events related to these Samsung phones, and the general perception of the population (not just in the US, but elsewhere in the world) is that they are taking a chance with their life with these devices. And even if majority of people are capable of doing the math and knowing that they have no reason for concern, this will ultimately end very badly for Samsung. There are increasingly louder calls to ban these devices from public transportation, and ordinary users simply won't be able to know whether they will be allowed on a plane, train or bus if they have a Samsung phone. Not to mention potential altercations in public, when an ignorant passenger says "That's a Samsung phone, you have to turn it off", and the owner replies, "But this is Galaxy 6, it's OK", and the dumb fellow replies "No, no, that's a Samsung, they explode, you have to turn it off NOW!!"... Under right circumstances, a righteous mob may well quickly form to kick the innocent Samsung owner out of the bus, or subway.
There is simply no effective way for Samsung to get this fixed right now. Only time will fix it, since, as well all know, general populace has a very short attention span and quickly forgets.