clock riddle

[Michal Jaegermann]

If you would have a Linux system where in a default configuration
everybody with a desktop session would be able to modify at will such
"insignificant" system settings like values of a hardware clock and
a system clock, not mentioning such details like global changes to
a configured timezone, then would you think that this is:
 - how it should be
 - a minor boo-boo
 - somewhat troublesome
 - or a really serious problem of a system integrity with security
   consequence too (messed up logs but not only)?

Now knowing that various programs will be seriously affected by
sudden changes in clock various, and ntpd is very careful when doing
clock adjustments, would you think that the situation described in
the previous paragraph is something which does not happen on Fedora
or maybe it does?

   Michal