Earlier quoted context omitted.
What safeguards? Obfuscating your IDs by... replacing them with one-to-one mapped other IDs?
I believe one can readily agree that https://example.com/profiles/gooosle and https://example.com/profiles/mdaniel are not sequential and thus not subject to enumeration in any reasonable way. A concrete example of defense against this is: please link to the HN username of an account which has never posted The other very common pattern is https://example.com/profiles/852c1a9a-29ae-4638-9d82-50e0d40... or its b36 enco…
Second, HN usernames are 100% enumerable. 'asdfgf' is an example of account which has never posted.