"My bank denied my loan application again, I can't believe them!" - Correct - Unknown, amorphous entity, regardless if the rejection was specifically caused by a man or woman or otherwise.
"temp8964 replied to me on HN again, she's quite persistent." - Incorrect - Without knowing who you are, is it still acceptable for me to blindly assert that you must be a woman and doing otherwise is wrong?
However, if we assume that Satoshi is a singular person, how do you suggest we refer to pseudonymous individuals whose gender and identity are unknown? Again, is it acceptable that I insist on referring to you as she/her without knowing who you are?
Assuming that it is the chosen, gendered name-on-the-internet that matters, if I were born biologically male but then undergo a sex change procedure and then and adopt a feminine name like Jane Smith in my work, would it be acceptable in your eyes to refer to me as she/her by default? Surely in this case, he/him or they/them would be unacceptable, if I follow your logic correctly.
I still would love to hear how you think people should refer to you, especially if you have not asserted your own pronouns. It seems, in reference to you, this is a classic, centuries-old case of singular 'they' being perfectly acceptable.
Also, see the HN guidelines.