LOTR characters rated by how much trouble they'd be in airport security:
(we're going to assume it's probably everybody's first time doing this)
Frodo: 3/10 - very cooperative but kinda nervous. If the Ring is on its chain, things are better because he doesn't have to put it in the bin, but he's still worried something might go wrong and it get taken away.
Sam: 3/10 - also very cooperative, pretty organized, unless he's never done this before, in which case he might be kinda nervous about keeping his belongings in sight.
Merry: 1/10 - very compliant, very organized. No complaints.
Pippin: 8/10 - disorganized, chaotic, definitely causes a bit of a scene. Starts taking off his shirt because somebody told him ahead of time "you have to take everything off" and he took it too literally. Probably sets off the body scanner because...that's just the luck he has.
Bilbo: 6/10 - doesn't want to take everything out of his pockets...for reasons. Other than that, he may be a little suspicious but he's mostly fine...if only because Gandalf magically does something to get him through without having to empty his pockets.
Boromir: 4/10 - doesn't want to be parted from his important belongings, slightly chaotic because he can't focus due to trying to keep his eye on his carry-on bag.
Gimli: 7/10 - Averse to the idea of being scanned, becomes defiant and causes an argument. Get your prying hands off his belongings the second they are through the bag scanner!
Legolas: 1/10 - very easy-going & compliant. Also has fair-of-face-beyond-the-measure-of-men privilege, so any issues are simply overlooked.
Aragorn: 9/10 - you remember this guy in Rohan when he had to give the guards his sword, right? Unexpectedly kind of a Karen about having to separate from his special heirloom sword. Unfortunately the security attendants do not care about its heritage or that Aragorn insists he won't hurt anyone. Definitely causes a scene. However, if no sword is involved, he's actually very chill.
Gandalf: either 1/10 or 11/10. Either he does something so all the little things (fireworks) in all his secret little pockets are magically overlooked, OR he causes a big scene like he did in Rohan when they told him to surrender his staff. Definitely causes chaos and frustrates everyone around him for holding up the line.
Elrond: 0/10 - super organized, knows all the protocol ahead of time, exceptionally nice and polite.
Galadriel: 1/10 - she might as well be the scanner, since she already knows what's in your mind. Probably knows what's in your luggage too. A little intimidating, but not problematic.
Faramir: 0/10 - very prepared, very cooperative, even helps other people. No complaints.
Thranduil: 5/10 - has pretty privilege but difficult vibes. A little bit perfectionist, gives the impression he's the one in charge even though he's not, which intimidates the security staff.
Denethor: 7/10 - doesn't even pretend to be polite, very suspicious of security protocol, likely to tell the staff they're doing something wrong.
Éomer: 5/10 - a little suspicious of security protocol, though not as much as Denethor. The security staff keeps an eye on him because he probably said something that comes across more threatening than he meant it.
Éowyn: 4/10 - not a problem herself, but if one of her friends has to get the pat-down, she will probably argue that "they shouldn't have to do that."
Lindir: 5/10 - so, so nervous even though he has like the least cause to be. Holds up the line triple checking there are no prohibited items on his person, then asking one of his friends to check and make sure there are no prohibited items on his person, in case he missed something.
Gollum: 12/10 - either he gets caught trying to sneak past security, or else he absolutely pitches a fit about the whole ordeal, refusing to put "the precious" in the bin, and screaming at the security attendants, calling them things like wicked, tricksy, suspicious, and cruel. Has to be physically thrown out of the airport.