An email is valid for one person/family only

[DawoudIO]

We need to start validating email address to ensure they are unique in the system. This is so what when we support oauth/facebook auth an email is unique

[crossan007]

This is not universally true. As "stone-age" as it sounds, some families still share an email address. I'm open to suggestions on how to account for this.

[respencer]

Sharing an email is a bad idea. It needs to be assigned to one person (even if in reality it's shared).

In my mailing list I filter out the duplicates (couples/families get 1 email from me, unless they are subscribed via another email).

I've also had people disappear on another system I used, as it assumed people that shared an email address or cellphone number was the same person -- and poof! they're gone.

That all being said this may be less of an issue than it was in the past. I know of only 1 couple with a shared email address that would even know what OAuth is.

All the youngsters that are most likely to use it have their own email addresses.

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