Mike, I would say about 25% of my hunts are at sites that are infested with old bottle caps. The next obvious question from the audience/membership here will be "then why don't you just find somewhere else to detect"? Well being fom the old school I will tell you my answer is if you aren't detecting where others don't want to then you are limiting your options and overlooking some great sites and some of the best finds to be had. I personally thought the question was shallow and one that was intented to sweep an issue away. Maybe I am reading into it but that is something I often do. Anyway, instead of focusing on how not to address something we all ought to be focusing on how best to accept that there will be issues/concerns with any and all detectors but if someone is having a problem then we should be supportive of it and help them in finding resolution.