[Threshold]

What do you mean by personal questions? Are they asking for things like your favorite sexual position and whether you have any identifying moles or markings on your genitalia?

Or are you simply talking about full name and an email address?

If you mean the former, then I agree, that's too much and will turn a lot of people away.

If you mean the latter, well I don't know of many (or perhaps any) commercial enterprises that are interested in dealing with a customer who is not even willing to provide their real identity.