This seems like the most plausible explanation. Whether the spots show up because of heating or pushing, the close proximity of some parts to the screen from underneath (by unfortunate design) seem to be causing this.
Are the "officials" silent on this issue because there is nothing they can do, or do they not recognize this to be enough of a problem that actually needs to be addressed?
I am pretty sure these spots are likely to be on a lot more screens out there, than reported in this thread.