Well since this is in Stress releace:
Only us all powerfull mods who look down on you lesser members, can lock and unlock threads.
Why, becuase we fucken can! OK! you got a problem with that?
Or if a thread is getting way to OT, or is becoming offensive or has to much flaming in it.
You got a fucken problem with that?
Or a member askes us to close it becuase they dont want any more replies to thier topic, etc
(please note the above was presented in such away it would fit with other posts in this forum,
)