People should write their info on paper more often. Meet someone on the train, have nice conversation, "this is my stop, here's my number/insta/tiktok/whateverthekidsusethesedays, hmu if you'd like to continue this over drinks" and leave it at that. It'll be clear you've asked them out, but they don't have to decide in the moment, they don't have to reject you to your face, and they don't have to give you any personal info. You leave them in a position where they only need to take action if they're interested in talking to you again, and they don't have to expend any additional energy on you if they're not interested.