From border crossings to hacking conferences, that Bitcoin or political sticker may be worth leaving on a case at home.
I had a very short conversation at the IndieWeb Summit 2018 in Portland with Nate Angell about the stickers on his laptop. Who knew he was such a subject area expert that Motherboard/Vice was using his material?
Of course this also reminds me that if academics, journalists, and publications/outlets were using webmentions when they credited creative commons articles, photos, audio, or other content, then the originator would get a notification that it was being used. This could also tip the originator off that their licensed content is being properly used.