New 51-folks like me would like to vote for "Not a good example" sometimes. We are tempted to vote for the opposite tendency (on/off-topic) instead, but what we really mean is "Not a good example". Voting for the opposite tendency won't prevent the example from becoming a "reference" example.
What is the real reason for the required 150 reputation? I can imagine two reasons:
(1) Maybe there would be too many "not a good example" votes if those were allowed to everybody. But it's possible to choose an appropriate limit.
(2) This lowers by 2 the reputation of the example's author. A solution for that could be to add some threshold (like -2 only after 5 votes).
Is there something else I miss? Except for that, I really enjoy this system.