Great question — answering as the UphillTech team:
First, I don't think a shirt is going to help much. For some people it will be too eager, a little weird even. For others, they aren't going to read it. But let's say someone reads it, believes it, takes it at face value, and wants to chat with you. Are you expecting them to come up to you and start a conversation? To do the work? Second, I think you will find you are in a vanishingly small minority. I don't know anyone who likes talking to strangers on planes. I am on my technology (or asleep) during my long flights because I would prefer to do that than talk to anyone. I am sure people exist who enjoy a good chat -- I have seen strangers talk on cruises and ferries and tours -- but it...
Full answer by Kate Gregory: https://travel.stackexchange.com/a/180170 (CC BY-SA 4.0).
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