It's the responsibility of business owners near the AT to deal with problem hikers and it's in their interest to do so. If they don't act, it's their choice.
If they want to charge more or exclude hikers in some other legal way from their establishment or prosecute that might be a solution. Maybe then, the AT would become about hiking again and primarily section hiking by people who have jobs, can afford to hike and know how to comport themselves.
Those hikers who travel with these individuals if they have any sense, will point out to them their errors. It is not our place, rather the businesses and their hiking companions who should watch out for themselves. The businesses at least may to a greater extent than many realize.