please remove permission check that disallows private-group access.

[Charlie Smurthwaite]

I'm new here, but I feel like chiming in, I hope my opinions are 
welcome. At first glance at this thread it seems unnecessary to argue 
about the necessity of these checks when when the option exists to give 
users the choice.

Adding configuration option(s) for users who wish to bypass these checks 
could allow experienced users to do what they need to, and less 
experienced users could still benefit form the protection by default.

Generally, giving users the choice should not be controversial, but I 
will note that there is the mild fear of a user googling the error and 
finding misguided advice to simply disable the check.

Charlie