font lock (locally, per file) ignore subscripts

[Uwe Brauer]

Hi 


I'd like that, in certain files, subscripts are ignored.

I know I could use ~ ~ as in 
 ~dl_emacs_support.m~ 

Or 

=dl_emacs_support.m=

But could I deactivate font locking for these constructions locally?

regards

Uwe Brauer