And no, they should not change once rolled out.
I can't see the logic in that. If the levels mean something, then if a message is issued with the wrong level, that's a bug. Like any bug, there are rare situations where the fact that existing users have adjusted to the bug means the bug has to be redefined as correct. But when you do that, you're trading the needs of these users for the needs of all the users who have not made such adjustments, including all new users forever. As this discussion has shown, the levels are pretty ambiguous in this program, so there's a lot of leeway in choosing them. I agree with giving history a lot of weight in making such arbitrary selections. -- Bryan Henderson San Jose, California