I propose a mod that detects a specific member using ad block. They then get a nice conversation message where you can explain to them why this is detrimental to the website and how they can disable ad block for your site.
Once the message is sent, the member will not be nagged again about ad block.
Another option would be to wipe all notified members. This way once per month or once every 2 months you can wipe the notified list and then re-notify them again. This would be helpful if they changed computers or browsers.
Thoughts? I am willing to put in some $ if someone wants to dev this.