Facebook, Twitter, or even Mediawiki, don't permit any random IP address full database access. (Or had better not.)
Rather, for the first two, large numbers of agents may request access limited to a specific account, with limited capabilities granted.
Even Mediawiki, with an extraordinarily open access model (painfully so in most cases) has checks on extensive abuse, and gradations of permissions.
Suggesting that any of these are comparable to full DBA access as the Meow attack (with considerable merits0 targets suggests an exceeding poor grasp of distinctions or misreading of GP's comment.
