I can understand if you feel bad about the article, then. Autism is a bit often discussed here at HN, is it?
At the same time, the article focuses on borderline (BPD), which is very different from autism or ADHD, is it?
I had a mental illness too (something else than BPD, autism and ADHD). Like you, I didn't write or say anything bad to others. Still, I appreciate the article, I think it's a small step for me towards understanding the Internet even better:
I know a borderline person, and I'm not the slightest surprised if in some cases, such a person can write extremely mean things to others on the internet. The person I know, does this in real life to people s/he loves, when too stressed up (about minor things others wouldn't think much about). It's not her fault; instead, s/he had a bad childhood.
(At the same time, there're also, of course, many other reasons for bad behavior on the net.)