Possible Duplicate:
Should SO rep be considered in SU and SF?
I have been a member of StackOverflow.com for a while now. Just today, I posted something on superuser.com and got the old, you can't post images unless you have 10 reputation points and you can't answer your own question unless you have 10 points.
Although it might make sense to keep certain aspects siloed, why not integrate the rest so that the user can have a unified and uniform experience?