A couple years ago we had a guy going around filing lawsuits against virtually every business in South Lake Tahoe over perceived ADA violations. The law is a good one, but there are grifters who abuse it to make it their primary income source.
See also: copyright trolls. This very forum became a victim of at least one of those.
Unlike copyright trolls though, someone who does this with the ADA is doing a public service. Nothing but respect and admiration for them!
Not if the plaintiffs are acting in bad faith to make a profit.
You could just as easily say that a copyright troll is simply preserving intellectual property rights.
