If it's not already possible it would be nice if it would be possible to automatically activate it for all new users for a certain timespan (ex. 7 days, 10 days, 2 weeks, 1 month, etc.) after the users have registered, and after this time periode it would stop track the members.
But it's simply a short text where I explain the difference of the freedom of speech and the right to be published. The freedom of speech will only give them the right to make their own web site to express their opinions, but they may not demand to be published on any other web sites. Then I follow up with an example from book publishing: You may write your own book, but you may not go to a publisher and demand them to publish it for you. If you want to publish it, and there are no publisers willing to do it, you would have to print the book yourself, and contact any stores and ask them if they would sell it. If noone will sell it, you'll have to open your own store to sell it. So if they would like to express themselves, they'll have to create their own forum/blog/web site.
This is a simple summary of the email, but it catches the major points.
Most people will understand and won't make any more problems.
Yes, the day is important. Look at Apple Inc. They will mainly introduce new products on tuesdays (even though they have released a few products on either wednesday or, very seldomly on a thursday, to make the most out of the interest of the press.