An agile coach (Jeff at https://rebelalliance.se/ https://rebelalliance.se/) I worked with had very strong feelings about this and would start meetings by demon

An agile coach (Jeff at https://rebelalliance.se/ https://rebelalliance.se/) I worked with had very strong feelings about this and would start meetings by demonstrating the proper way to detach a Post-It. Off brand sticky notes were also verboten IIRC. I think his method was to lift the sheet just a little, then pulling down instead of up/out. That way they stay perfectly flat. Not sure if you are on HN Jeff, but if you are: Iam Lusum perdidisti.