Very easy trap for newbies, maybe even for intermediate users.
Most wallets require you to rewrite the seed after saving it in order to make sure it's the correct one. It's easy to mistake that assurance step for this one.
If a person thinks of him/herself as an "intermediate user" and gets scammed by voluntarily handing over his/her wallet's backup phrase, I don't think he/she deserves the title "intermediate user".

There's a big difference of storing the keys for yourself and handing it over to a central authority, regardless who that central authority is.