Blocking COPY ???

[Richmond]

I have a fantasy (???) and would like to implement something like
this in either sa stack or car script:

on copy
    don't
end copy

or something like this:

on copy
   set the clipboardData to "No Luck Chum"
end copy

this would be a way to block all the multiple ways of copying text 
end-users have in a Demo.

but of course as soon as I write a script with "on copy" the thing 
throws a wobbly.

Richmond.