FYI: here are the videos of the latest matrix conference: [1]. I think there's a lot of interesting stuff going on!
also, instead of hosting your own server or using some (more or less well-financed) public servers, you can simply throw some money at [2] to pay for hosting for your group of friends or family or whatever. (not affiliated, but I like the idea)
There's a big difference between the materials that's used for the sticker itself (paper, plastic) and the glue they used.
By now I have a good feeling about the "removability" of a sticker once i have it in my hand.
