Wanted to say thanks for this feature

On Reddit, sometimes I'd try to submit a comment and on my end it looked like it didn't send. So I hit the button again to submit. And then upon reload (maybe when I come back later to read replies) I find there were two duplicate comments created. Then I have to go delete the duplicate. (I'd also see this happen to other people, in which case I upvoted their reply with the most upvotes and downvoted its duplicate.)

Same thing happened today on PieFed. Tried to submit a comment. Thought it didn't send. So I hit the button again to submit. Very pleased that I did not end up being allowed to make that duplicate comment (thereby letting me know the first did get through). It's also probably helpful for preventing intentional spam ;)