It's not the first time I've heard about it, but honestly I didn't pay too much attention to such things a few years ago. I also occasionally used the same wallet as the OP and noticed that option and now that I'm reading this topic I wonder why every wallet doesn't have this option if it's really so good for privacy?

Maybe we should start promoting this way of sending/receiving BTC on this forum - maybe signature campaigns would be ideal for something like that?