I am aware that storing things on the blockchain has been possible for a long time and it is probably already being abused for things I mentioned about. But it kind of is not very widely known and perhaps it's best if we could keep it that way...
Seriously, if the press will pick up on what crap can or is already stored on the blockchain it's goodbye bitcoin.
I have no fear that coercive authorities will try to make bitcoin go away. Of course they will. They will fail too. It is in the nature of coercive authorities to attack so much that is good that the rest of us withdraw whatever support we've been providing them and then their regime crumbles. Thanks be to Satoshi.
For those wanting to see messages directly in the blockchain, a better hex-to-ascii converter is available at
http://www.rapidtables.com/convert/number/hex-to-ascii.htm