Like just now reading this thread anonymously on my phone and then at a later time, after some more contemplation, going to my computer and writing this comment. That break does three things. First, I get to think about why I am commenting. Second, if I decide that I do still want to comment, I've had some "offline" time to think about it. Third, by the time I am back on my computer I may have just forgot about it, or find that someone had already made the same comment as I had intended.

Only about 1/5 of the time will I comment on something that - after reading on my phone - I had felt compelled to comment on.

Reddit I never look at on my phone. I came late to Reddit - maybe a year ago. But I'm now a Reddit junky and probably spend an hour a day on it. Reddit does make it easier to avoid using on one's phone. For one, they aggressively push their app and I don't install apps. Second, they don't let you look at any content they deem "sensitive" without logging in. The result is that I will only use Reddit on my computer and that for me greatly limits my time spend there as I don't view my computer as an entertainment device.