If anything, I'd say that a few people voting numerous times disagree...either that, or TPU has a particularly strong mobile-OC contingent - no doubt helped the influx of new members. But hardly representative of sales as a whole.
I'm going to go out on a limb and say 45% of laptop owners don't overclock either GPU or CPU, and I doubt even desktop ownership sees anything close to that kind of number.
As for the issue itself, as an enthusiast it always grieves me to see vendors and manufacturers treat us like toddlers found playing with matches. From the point of view of the business as whole, I'm remain perpetually surprised that mobile (given the high return rate) isn't fully locked down, plastered with tamperproof seals, and put together with proprietary fastenings. Of the laptops I've been given to "fix" due to overclocking, the end results are more often than not much more severe than for desktop parts. It seems that 5 minutes of Google is all that is required for some people to download a modded BIOS and push the power limits to the stops. By the time I get it, all they want is for an original BIOS reflash so they can send it off for a warranty claim. At the very least, they've played with some bundled OC utility, or downloaded XTU and managed to turn their system into an unstable basket case.