Actually going to have to with Aaron on this.
I get where YP is coming from, but part of the way a person exercises her responsibility is to ignore what cannot be reasoned with. Once I have deemed a particular person (account, site, phone number, etc.) to be harmful to myself (physically, psychologically, morally, or financially), then I should be able to ‘politely’ ignore them or otherwise avoid engagement.
You CAN do this without technology, but just like anything about humans, while we aren’t all created equally, technology does a great bit to even the scales and allow a person to do what others can. Much like glasses can help those whose eyes are WEAK engage and participate in society in a normal fashion, technological aids such as a block function can help those whose particular mental facilities might be weak in ignoring external possible threats (hypervigilance) engage and participate in societal norms.
However, having said all this, I also believe it’s a person’s responsibility to not abuse technological aids.
So, I’m okay with a block/ignore function.