That's totally different - indictments are usually sealed before arrests in the kind of case you're talking about and there is longstanding precedent for that to prevent flight from prosecution. They would arrest you for ITAR and IEEPA violations before you board. That kind of thing happened long before the no fly list. That is different than an opaque list with a million people on it most of which have never been accused of anything and where there is an expensive appeals process and the government is allowed to use secret evidence.

Why do you think they put people on the no fly list?

It's very well documented, no point in speculating.

https://www.tsa.gov/travel/passenger-support/travel-redress-...

https://en.wikipedia.org/wiki/No_Fly_List

> The No Fly List is a small subset of the U.S. government Terrorist Screening Database (also known as the terrorist watchlist) that contains the identity information of known or suspected terrorists.

The TSA comment above is pretty straight forward but to be fair the wiki article is filled with instances of speculation.

The way people end up on this list is super opaque, but it's certainly not used to catch wanted criminals.

In fact, the US doesn't have super reliable systems to stop fugitives at airports except on entry.