The point of the blocking feature is that the individual creators shouldn't have to abide by someone else's definition of what deserves a block and what doesn't. They choose for themselves what they think is overstepping the line.
Personally, if I saw anyone spewing "Anti-SJW" stuff on my page or any of my comics, I would warn them that their propaganda is unwelcome in my comments sections, and if they didn't stop I would block them. It would not be censorship because they still have the whole internet to wander around on, and those of us that are hurt by them sure do feel it. My audience is full of transgender and nonbinary people who already have to take enough in the form of respectless parents, corrupt healthcare systems and the general public's opinion (us trans folk literally get killed in the streets still).
The last thing they need is someone shoving the same things in their face and telling them their feelings are invalid on top of that when they seek a moment of peace in the webcomics and communities where they feel like they can be proud and accepted for what they are. And I will protect my main audience to the very last drop.
Also on Webtoons I've seen fans telling each other to commit suicide. It is nice to finally have some actual permanent power to use in case that ever happens in my tapas audience o_o'''
vvv Also, I second this, this XKCD is pretty spot on: vvv
Loving the blocking feature, guys. Thanks for giving more power to the creators and helping us protect ourselves and our fans.