I think most of you are missing the strategy on this idea.

It would not create a new blockchain but instead piggyback on an already existing one.  You can attach a message to every ethereum transaction you send.  This idea is simply using existing infrastructure to create a decentralized way to communicate.

People would then be able to create websites like https://memo.cash/posts/ranked that pull all the data. 

The cool part to me is that it would take away all the power from one site and I think you would see a sort of subreddit phonemonema happen where users could make their own sites that pull and sort the data (censor) as they see fit.

Some sites would censor all hate speech, some would censor speech from people they don't like, some would censor nothing at all.