I never had a conversation on geocities, but I do remember you could do some SSI stuff, so maybe it was possible. I think lost my last geocities site password and didn’t care to go through the effort of resetting it in '96 or so.
You can telnet into the HTTP port basically everywhere that doesn’t auto-redirect to the HTTPS port (and start/resume a TLS session), and there could be stuff in the HTML source (or headers) that a browser might hide from you, at least by default – but I can’t think of how you would use that in geocities to “see private messages”. (In theory you could manually start/resume a TLS session, but a proper telnet client might break on some of the bytes received, and you’d definitely have to figure out how to send some non-ASCII bytes.)
I never had a conversation on geocities, but I do remember you could do some SSI stuff, so maybe it was possible. I think lost my last geocities site password and didn’t care to go through the effort of resetting it in '96 or so.
You can telnet into the HTTP port basically everywhere that doesn’t auto-redirect to the HTTPS port (and start/resume a TLS session), and there could be stuff in the HTML source (or headers) that a browser might hide from you, at least by default – but I can’t think of how you would use that in geocities to “see private messages”. (In theory you could manually start/resume a TLS session, but a proper telnet client might break on some of the bytes received, and you’d definitely have to figure out how to send some non-ASCII bytes.)