Weird ad hominem flex. And "across" doesn't imply multiple accounts at once. People who register with their company email may be forced to create a new account when they leave the company (perhaps with sudden and unexpected loss of access to the account).

Here's the actual guideline (not rule):

"Throwaway accounts are ok for sensitive information, but please don't create accounts routinely. HN is a community—users should have an identity that others can relate to."

People have commented both appreciating your clear definitions and calling you out for the condescension, with a perfect xkcd suggesting an attitude change. It's up to you how you react to such feedback.