Sandblasting = throwing very fast sharp rocks at it on a small scale.
This would indeed shatter it as much as drilling with a diamond abrasive.
The only thing that MIGHT work would be etching it with a fluoride etch but still
the interior of the glass is under very high tension to balance the residual surface compression
that you would probably be pretty lucky to get a hole through it without damage.
Further, you would want to insulate the screw from the inner surface of the hole so
you don't initiate a fracture there, but do ALL the clamping on the inner and outer surface
of the glass where it is in compression.
I imagine the windows with holes in them had the hole there before the tempering heat treatment.
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George Downs Bartlesville, Oklahoma