RMS could have taken a photo of his screen, or done something cheeky like dump his screen to a padded ASCII text file and submitted that. Stick in the mud.
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I walked up and introduced myself and said that I was a big fan, appreciated his hard work, etc. He looked at me coldly and just said "so are you going to buy something?" and motioned toward the booklets. I didn't need a printed copy of the `sed` man page so I shrugged and he seemed quite annoyed, turned to his assistant with a notebook computer and started dictating something to them, as almost to make it clear that our interaction was over.
I'm not sure what the point of posting this is, but that's my RMS story - it was my first "never meet your heroes" moment, I guess.
So I walked up, I introduced myself and asked a question about the freedom of _data_ versus the freedom of _software_, and without looking up to me he said "I don't do smalltalk". So I got back to my seat and told my "story" to my immediate neighbors, who were keen to learn what he'd said.
(He is much more constructive by email.)
When you do this, you get his "rider". Google it, it's real, it's infamous for the "don't buy me a parrot" section.
Anyway, in that, he makes clear that if people at dinner are not interested in talking about free software, he's going to pull out his laptop and get on with his work relating to free software.
He doesn't care about fancy food, drinks, etc. - he wants to raise money for free software, and work on free software. He did this in a restaurant when three others of us were chatting about something else, and we all just accepted that's what he does, and that's him. It was fine.
If you're not familiar with him or this, then it's going to be a weird experience.
He also struggles with social interactions in my limited experience, particularly when it's a "fan boy" interaction.
I've seen him not being super nice to other people who were trying to have a conversation with him, not because he's not a nice person (I found him quite personable one on one), but it seems to me that he struggles to know how to behave around people who don't know how to just talk to him about things he wants to talk about.
I once saw him in the audience of a conference with quite a notable set of speakers [0], and I can't remember who it was who he started hectoring in the Q&A (I mean, look at the speaker list, whoever it was, it's somebody you've probably heard of), but he just diverted it into a little lesson about free software for the speaker and everyone else listening. It's the only thing he cares about talking about. It's either a super-power focus, or really annoying. I personally think at this point you just either need to meet him where he is, or avoid him if you don't want to. He's not going to change.
I'm glad I met him, I'm glad he does what he does, I know he's a little spikier than others around him and I'm OK with that. I also know plenty of people who never want to speak to him ever again and think free software needs a new figurehead.
[0] https://curation.cs.manchester.ac.uk/Turing100/www.turing100...
I'd argue that while he may be nice, it's also generally considered impolite to be someone who "only talks to him about the things he wants to talk about". It's meant to be a two-way street, generally. Someone who only wants to talk about what -they- are interested in, not what their conversation partner is interested in is not being nice or polite.