A sort of balance must exist because we're talking about an online community. If a member feels uncomfortable, obviously would leave. That may not concern however remote it may be, new users will come like a cascade does

But, even great sites like Facebook are changing that line of thinking of merely
"I do what I want". Sites that doesn't meet with standard values or doesn't grow in terms of flexibility, will decline to make room more comfortable communities... or even similar sites.
This popup can be the most annoying for someone, my case, I don't reset cookies and fortunately cookies doesn't expire so fast, everything is fine. Despite of that, I remember such advertisement wasn't
well received the first time I logged in days ago. I had to register mandatory (long time ago) to several websites only to see a worthless posts (or dead links).
So, time will say if a site policy really works for you, hope for the best sake in the world. However, these suggestions are not crazy ideas.
A dictatorship would be a heck of a lot easier, there's no question about it. (George W. Bush).
P.S. I want to add, that little change in the popup logic is really great!
P.P.S.
We must become the change we want to see. (Gandhi)