I'm not sure if enough of "anonymous" gives a damn to attack Tumblr on the basis that they're hipster memestealers. I think they might do it for s*its & giggles. We'll see. On reddit, there's this quip::
"Raiding /b/ is like pissing in an ocean of piss."
Twitterversion:: [blog] 4Chan's /b/ declares war on Tumblr & vice versa. Attacking 4chan? Isn't that like invading Afghanistan? @Prof_K