There was a bipartisan bill that passed the House 2 years ago (https://www.congress.gov/bill/115th-congress/house-bill/620/...) that aimed at closing drive-by ADA shakedowns. The bill required claimants to give 120 days to business to fix issue. It seems the bill hasn't been signed by the Senate (not sure why, if anyone knows more let me know). This is a good bill, hopefully it will pass.
edit: Found why it didn't pass the Senate. Democrats in Senate promised to filibuster any attempt to bring the bill to the floor. https://rewire.news/article/2018/04/03/sen-tammy-duckworth-s....