robchur wrote:

What happens if, for example, a "rogue administrator" blocks all other
administrators, and then proceeds to cause damage unchecked? Or in the more
likely situation, the administrator of a small wiki with few - or no - other
administrators accidentally blocks themselves?

This has been proposed before with the same outcome. If there are insufficient
stewards to fulfill needs, then appoint more. If the existing stewards aren't
doing their jobs, then replace them.

mcdevitd wrote:

Not to argue, but there is no difference between an admin blocking all and
acting unchecked, or unblocking himself repeatedly to do that. Except that only
one of them is likely to delete the main page or edit the sitenotice of a top 10
website with 100 other admins that it would be impossible to block, practically
speaking.

ayg wrote:

*** This bug has been marked as a duplicate of 3072 ***