Area 51 has a mechanism for making sure that dubious questions are not counted among the five good off-topic questions: they need four times as many off-topic votes as on-topic votes. There should also be such a mechanism to avoid counting questions with many "not a good example" votes.
As an example, one of the off-topic questions for Bioinformatics is "What is the meaning of life?", with 24 off-topic votes and 14 bad-example votes. It should not count due to the disagreement.