Wikipedia is like a subgraph of the internet. Are there good reasons for certain sites to be blocked on the net? Yes? Should I just be allowed to call you a stu

Wikipedia is like a subgraph of the internet. Are there good reasons for certain sites to be blocked on the net? Yes? Should I just be allowed to call you a stupid plucktwit as if I was f'in Linus Torvalds (just for illustration purposes (psyched, I'm really enjoying this(I'm not even making the turn around to illustrate the analogy to Wikipedia any further)))? I guess deletion also serves to keep editors in check, if they don't meet quality standards. It's simply more difficult to delete a deletion-privileged user who has also a number of contributions under the belt. This is similar to police corruption, or shirky's principle.