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by ROFISH 6343 days ago
It depends upon the application. I run a semi-popular forum, so I require email addresses to keep the ban evaders, trolls, and spambots out. If you think you're going to have problems with the former two, keep the email requirement. However, if you're not doing a community related thing where everybody has to play nice, like a service app like Basecamp, feel free to not require it.
1 comments

If there are money involved (I'm thinking about Basecamp), email address should be required.