To block or not to block, said the mason while grabbing another brick for the wall....... (You know I can't help myself most of the time... please don't block me !!!!! ). And getting back to being serious, no I have not block a single person yet. Of course there are few marginal ones that, as a minimum get really annoying when the answer is completely out of context. Or repetitive comments back to the same stuff like it is trapped and going in circles in their head.... that's about it.

I have only blocked one person - an anti <science,vax> person that I just could not deal with. One of the reasons I left Facebook was the know nothings - and I don’t want that here.

Two. One is a totally indifferent ego that doesn't care and is racing to reach level 10. The other is someone that kept criticize and making fun of me without any argument.
I don't mind that people don't agree, I even don't care. But I don't like to be mocked.

Like so many things it’s up to the person and the line that they won’t allow to be crossed. As for me none as of yet. My criteria for blocking is if they are being a vulgar person or if the person is being malicious or harassing.

None and I would only block someone if they were continually abusive or threatening.

None, i'm too clever for them. ? Some have blocked me though lol

I try to avoid it. If I'm feeling harassed, I definitely do, but if it's because I disagree with someone... I feel that's the whole purpose of this... to talk, agree, disagree, and expose ourselves to new ideas.

Haven't blocked anyone on this site. Only site I've blocked people is Facebook. I've probably blocked about 10 or 15 on Facebook, including a cousin & Sister in law, Lol.. OTOH, that may be commonplace for FB.

I have been blocked . The criteria is just disagree with someone they will soon block you

Zero.
If you're unable to stand reading the opposing view, then are you here?

I suspect some of the ladies on here block predator folks. But being an ancient married guy, I don't have that problem.

Zero blocked. It's the internet.
I think I've been blocked by at least one lady for my apparent lack of sensitivity.

No blocks

People who objectify or monetarize victims of theocratic patriarchy are instantly blocked. ...I will not debate or entertain TrumpOLINIbots or BillaryBOTS. ...we need competence in the White House so vote peace through green jobs www.jill2016.com

I might feel like blocking but I avoid it. I have blocked no one.