There's a lot of crazy unstable people, they wont know about or be able to regularly plan monitoring FlightRadar24. They can however see "Musk lands in Chicago Midway" and run down there.

So, yes a targeted organized attack wouldn't be overly hard a random chaotic attack is easier with this twitter account.

By the time you found out a plane landed in Chicago, it's waaaaaay too late to intercept. People that stupid aren't a danger. It's exactly the people who know you can use public ADS-B trackers to see flight plans and predict landing times that you might actually worry about.

This is a great line of reasoning that can be used to justify banning anything. What if a soft-headed person reads it and does something horrible... Like, say, attempt to carry out a coup?

It'd be great if the same standard were applies to things like bomb threats at children's hospitals because some fruit loops have convinced themselves that Pepe Silvia is hiding there, or that drag shows are an existential threat which much be opposed with gunfire.