Scenario 3 the poster is a cool looking image with people doing something that interests me. There is a QR code and no other information.
Scenario 3 the poster says something is happening like "Neighbourhood dinner, Sunday at 7 -- Want to help cooking? Scan this code" -- There is a QR code but no information about who is organising it, where it is or how else to contact someone about helping to cook.
Yes, a name serve just as well as a URL, the point is that people begin to believe that a QR code is more convenient than text. Give me a link, give me a name, give me a search term, just give me something more than a QR code.
If you need to add human readable information (which is your scenario), a URL is never the right answer. Write a name or a sentence. Computer-readable information is for computers to read.
Scenario 3 the poster says something is happening like "Neighbourhood dinner, Sunday at 7 -- Want to help cooking? Scan this code" -- There is a QR code but no information about who is organising it, where it is or how else to contact someone about helping to cook.
Yes, a name serve just as well as a URL, the point is that people begin to believe that a QR code is more convenient than text. Give me a link, give me a name, give me a search term, just give me something more than a QR code.