I suspect that Oscar's complaint stems from emails that quote an entire message (or even the entire thread), then bury their responses within.

Yes

This is a legitimate complaint, as it does make their emails very hard to read. Top-posting may be better than this. However, it's much better to quote only the specific excerpt that you're replying to, and put that above your reply.

I'm sure that we can all interpret well what oscar mentioned. It means extract the information, set the context and reply and not lengthly mail, no hijacking of thread. Stef