I agree with a lot of the other comments here. I've been using a catch-all for years without significant problems. I think the closest to an awkward moment was

I agree with a lot of the other comments here. I've been using a catch-all for years without significant problems. I think the closest to an awkward moment was when a small web comic artist wrote to me a bit confused. I had used the name of her comic to subscribe to her newsletter. I explained what it was and we had a laugh - if anything it perhaps increased a bit of human connection between us that otherwise wouldn't have existed. I feel as though the author is throwing away a lot of advantages because of some minor social awkwardness that can be worked through, or completely avoided by using a different naming pattern. We're even starting to see one-off emails created for you automatically (iOS can do this) because of the number of advantages.