I'm glad it's off by default - I think furyg3's post above does a perfect job of explaining why. I'd also add another issue that makes them bothersome - lots o

I'm glad it's off by default - I think furyg3's post above does a perfect job of explaining why. I'd also add another issue that makes them bothersome - lots of times I read short messages via their incoming notifications which (afaik) doesn't update "read" status. So if I had read receipts on, I'd often appear to have not read something for hours that I actually had. Not that these issues make read receipts for short messages useless and I suppose it's nice to have them as a feature for groups of people that want/need it for whatever reason, but I think opt-in is the right default for it.