The same thing that stops them from happening on every other platform EXCEPT this one?
Respected tuners aren't blamed for popped motors on any other platform without evidence, why would they be blamed here?
The reality is that it opens peoples eyes to what's going on, and ultimately holds pro tuners to a higher standard now that what they're doing could be peer-reviewed.
Jeremy Formato has made a living for the past 10+ years by tuning LSx cars throughout Florida. Have some popped? Probably. But was he blammed for it? Not unless there was proof that what he did was wrong, and plenty of people (myself included) had the ability to alter the parameters that he initially configured.
A lot of the BS black magic voodoo hush hush top secret tuning crap will now come to light, and people can see the hack tunes for what they are.