There's a lot of misunderstanding here that's worth explanation given that it's currently a hot topic.
One of the great features of Steem is its decentralization, which means that there are no "admins" or "moderators" able to stop any content from appearing on Steem. That includes such "campaigns" as you just saw. Purely stupid (someone apparently being angry and against the downvotes threatens to .. downvote if blah blah).
Don't be scared, community responded well, besides effective voting power, after being split among all who votes for @themarkymark will no longer be that impressive ;-)