What are "discouraged blocks" in the blockchain? (examples and explanation please) As of the time I write this, only one block type is marked as "discouraged", and I'd like to understand why this exists.


Is a correct reading that is that "it should be in the blockchain?
Is this simply the block number embedded in the transaction?
Are there any sample blocks that do or don't have this information?
The wiki article you describe has been updated since by a skilled developer who is part of the Bitcoin team and the key change now reads:


  Bitcoin does not currently implement block discouraging in any form.


So this appears to be a concept that has not been implemented by any clients.