Just because a feature is possible does not make it desirable. Website owners are burdening themselves with overkill every day.
LinkedIn: Full profiles for 3rd-degree connections are available only to premium account holders.
The underlying problem is LinkedIn is runny by a Tricky Dicky, Reid Hoffman. We are just raw meat to LinkedIn.
Linked In will spam you to death: they never release email addresses
LinkedIn claim a bug in their system which is not releasing email addresses that were entered at one time and later removed.
