Validate email addresses before displaying them

[samuelgoto]

We should validate if email addresses are well formed before displaying them.

We also want to allow for extensible ways to represent users, so we should also support a free-text descriptor like username (as suggested here), but there is value in enforcing that email addresses are well formed.

[npm1]

What do you propose doing if an email field is detected to contain something that is not an email address?

[wparad]

And can I ask, what does this have to do with the username usage, which feels much more important.