What's the worst thing you can transmit with 20 bytes? A link to a website? A couple of the 7 words? A "yo mama" joke? C'mon this is a BS linkbait article
A link to insert boogeyman here which is also on the hard disks of a few hundred thousand other people, downloaded automatically, and stored in a file with a dozen other gigs of bitcoin transaction data.
We live in a world where folks like Aaron Swartz get driven to suicide by overzealous prosecutors, and you don't think law enforcement could use that sort of thing as an excuse to harass you?