The good news for potential defendants is that the only remedies available in private ADA suits are injunctions that force you to come into compliance and attorneys’ fees. If the Department of Justice gets involved, they can seek civil fines and penalties. Hence, you need to do the risk/benefit analysis as to whether it is worth challenging the claim or not. This report says the lawsuits are on the rise.
The words in the tag should be more than a description. They should provide a text equivalent of the image. In other words, the tag should include the same meaningful information that other users obtain by looking at the image. In the example of the mayor’s picture, adding an “alt” tag with the words “Photograph of Mayor Jane Smith” provides a meaningful description.