Lets get electrocuted

There is this sign on the bottom of the escalators in our building.  It clearly states you shouldn't drill into it...

What do the carpenters do?  Attach metal studs to the bottom using self tapping screws (which have a drill bit on the end)..

The reason not to is that there is sensitive mechanics and electrical equipment on the other side..  Oh and they screwed some in right where the electrical supply conduit enters.  I believe that it is a juicy 600 AMPS more than enough to blacken your socks...