If this feature becomes popular among webmasters (it should, as many use only Adsense which is usually far from intrusive), it will become annoying for the user.

I see a possible solution in tracking users' decisions to show or disable supposedly unintrusive ads. This way ABP will be able to see which websites likely abuse this feature and which websites are likely fair in claiming non-intrusiveness. So, in 'obvious' cases ABP could make an automatic decision to show or hide the ads.

P.S. I hope the above is readable.