From white list to black list

It would be nice if we could decide to blacklist an address that is in the white list with a right click for instance.
By the way how do these addresses end up in the white list in the first place?
Thanks in advance.
GP

No, you should not need it edit the blocklist and whitelist in that way. It will all happen automatically if you correct the mistakes by training SpamSieve. For more information, please see Spammy Whitelist Rules.