The implication being political ads have been honest and forthright up until now? Is everyone at Facebook too young to remember the Daisy Ad in 1964? (or, for that matter, whatever their education, it didn't include a political science class?)
The answer to this doesn't have anything to do with AI, or attack ads, honesty or politics. It's to learn for yourself and to teach those around you NOT to be swayed by sensationalist fear-mongering. Learn your parties. Learn the issues. If you're casting your vote out of fear for what "the other guys" will do, you're part of the problem. Democracy is "the rule of the people." Fixing it starts with YOU. Not "them", not a company, not a policy.