OK, while I'm on record as stating that StackExchange UI is pretty much one of the best websites and overall GUIs that I have ever seen as far as usability goes, there's one particular aspect of the trilogy that bugs me.

For an example, head on to http://meta.stackoverflow.com .

Look at the banner on top (the one that says "reminder -- it's April Fool's Day depending on your time zone!").

Personally, I feel that this is a "make the user do the figuring out work" anti-pattern (whatever it's officially called) - namely, instead of making your app smart enough to only present a certain mode of operations in the conditions when that mode is appropriate, you simply turn on the mode full on and put an explanation to the user of why the mode is on when it should not be (in this particular example, the mode is of course displaying the unicorn gravatars starting with 00:00 in the first timezone, despite the fact that some users still live in March 31st).

The Great Recalc was also handled the same way - instead of proactively telling the user "your rep was changed from X to Y" the same nearly invisible banner was displayed on meta.

So, the questions are:

• Is there such an official anti-pattern, and if so,m what the heck do i call it?
• Do you have any other well-known examples of such design anti-pattern?
• How would you fix either the SO example I made or you your own example? Is there a pattern of fixing or must it be a case-by-case solution?