Would it be rude to just say, " I would rather just be quiet now?"
Not really rude, but if you want, you can even soften that. Don't let them start to talk, draw the line before they even think of bothering you. When travelling, I use those tips:
- Excuse yourself from the very beginning, explaining that you'll have to rest/work/read... "I have to do [ x ], I'll do my best to not bother you."
- Put earplugs and/or read/rest.
- Put earphones on (even if you don't listen to music/news/course...) and do "like if".
- Put earphones on and watch a movie or play on your phone.
- If possible, put a small book about buddhism on the tray in front of you, and remain silent: people will think you repeat mantra and will hesitate to talk to you. (A friend of mine spends one hour each day doing this, not moving, or talking, when on his train, going to work).
- Buy an old device for hearing-impaired person and put it on one ear (*).
1. don't say that you'd rather just be quiet but that you need to be quiet (and show them).
2. make the 1st move, don't give them a chance, and keep yourself "busy" or "kind of".
(*) this one came to my mind because my mom has huge problems with her ears, wears a device, and never gets people talking to her while on a plane, in a supermarket, a waiting-room...
EDIT: @HDE-226868 made me understand I didn't make myself clear, so, for the record, I keep it below, with a big flag : I saw someone doing this, and I neither would do it, nor I support it. I did not put the different tips on a value-scale, I should have...
- If they talk to you, answer with ASL (need to learn ONE sentence before though). Tricky (but I noticed someone doing this, once), in case someone sees you and asks for help with ASL.