Unix already has "attributes"...

[Tanner Andrews]

] ... execute only privilege ... only reason is spolier-hiding ... games

There is one other reason for this -- prevention of rampant copies of
assorted progs.  Old versions of things for which people have a fondness
are bad enough.  People make copies of games so that they may be played
during busy times;  execute-only prevents this.

-- 
<std dsclm, copies upon request>	   Tanner Andrews, KI4PV
uucp:					...!decvax!ucf-cs!ki4pv!tanner