I strongly agree with points 2 and 3*, but I strongly disagree with point 1 as written, because it is much too vauge and leaves too many questions open. For example, knowing the history of Worst Nodes, if you were to implement this policy retroactively, you'd have to revoke the voting privileges of a significant number of users.
* Point 3 could perhaps be more simply worded as "voting on your own nodes, for example through a second account" (similar to what is explained Site Rules Governing User Accounts).