It's also not like we're in the nascent days of aviation anymore. Back when planes were still a frightening novelty, it probably wasn't out of place for someone to start cheering when the plane landed, or took off, or pretty much did anything at all. These days, it makes you look like a 5-year-old who can't believe he survived his first flight back to Dubuque to visit nana.
If you're reading and think I'm just an asshole, that's fine. Maybe I am! Maybe it really is perfectly acceptable to holler and whistle whenever the tires touch the tarmac, because you paid for your seat, and damn if you're not gonna show your appreciation. You're probably also the first person to start clapping in a movie theater once the credits start to roll, even though nobody involved in making the movie is actually present. And maybe that's okay too!