Both of these can be found at US airports with international flights(and most countries have equivalents). Going on an international trip you will encounter both, for a domestic flight you will only deal with the TSA.
The EFF article is aimed exclusively at people crossing the border so it about the CBP, not about the TSA. If you never leave the USA or never travel to it then you will encounter none of this.
Went to secondary to get more information on my trip, then just routinely searched my bags and electric devices. I was allowed into the country after they got more information.
Not really? In the same guide it says
>If you later want to remove this restriction you can Remove -> Profiles... in Configurator, analogous to step 15.
Basically, you're just hoping that the minimum wage employee at the TSA doesn't know about removing the profile.
Earlier the article says
> This setting controls when someone can remove the profile from within the phone itself. If it’s left as the default value of “Always” then anyone with access to your unlocked phone could remove the pair lock (which would defeat the entire purpose). You can either set it to Never to never allow removing the profile, or With Authorization and set a password to allow removing the profile with the given password (this might be useful to remove the pairing restriction if you do lose access to your laptop).
EFF also have a nice guide called "Digital Privacy at the U.S. Border" (PDF): https://www.eff.org/files/2018/01/11/digital-privacy-border-...