Oh...-that's- your point:
No, Wikipedia needs to realize that the IP address correlation they enjoy outside of Tor is a happy accident, and that they should stop treating IP addressess as user credentials. If they want credentials, they need to implement them.
Well, is it reasonable to expect a creature to evolve to an environment that doesn't exist yet?
On the other hand, I don't think the number of Tor IP addresses is anywhere near its hockeystick yet, and when it comes it will be changing far too fast for them to block.
So they will ultimately have to change their model, methinks. -TD