Or sometimes we see ID questions where the track to be IDed is on a page where the legality is doubtful (like https://musicfans.stackexchange.com/q/7431/3260) or where we need to have an account and to be logged in, like :

* Dropbox
* Google Drive
* Youtube (when sometimes requires a connexion)
* Instagram
* Facebook
* Twitter
* etc...

Do we allow this?

I suggest we restrict the hosts to a limited list (Youtube, Soundcloud...?) and ask users to change the host of their content, then eventually close the question.