I’m a fan of blocking too. Luckily most Medium readers are of a higher caliber than the internet as a whole, but I’ve had my share of blocked geniuses.
I see a trend. Most trolls tend to have written nothing themselves. It’s easy to be awful when you’ve posted nothing publicly someone can criticize.
Keep writing the good stuff.
The trolls will all die of loneliness and self-loathing, eventually.