Locking files (both read and write) always allowed?

[Syzop]

Hi,

(Before I start, don't worry [:PP] this has nothing to do with the oplock problem I've
explained earlier...)

The (theoretical) problem is: every user can lock any file.
I tested this with QBASIC (yeah!!) with an lowprivileged user,
user has only read access to the share.
when I do something like:
(q: = networkdrive)
--
open "q:\apps\netscape\programs\netscape.exe" for random lock read write as #1
k$=input$(1)
close #1
--
Nobody can start netscape anymore (!) until I hit a key.

Is this the expected behavior?
Does it break things when changed?
In short: why is this possible, for me it's pretty dangerous when any user
can lock the other XX users out of every program :P

Ofcourse I can(/will have to) change the source, but just wanted to know
if this can't be changed in future samba releases.

Cya,

    Syz.