I see what you are saying. But on the other hand, I definitely neglected to report bugs in the past because I had to subscribe to a mailing list or sign up for

I see what you are saying. But on the other hand, I definitely neglected to report bugs in the past because I had to subscribe to a mailing list or sign up for another yet another bugzilla account (combined with bugzilla often being terribly slow). I think GitHub has provided a net improvement because many smaller project get bug reports now (whereas they usually didn't in pre-GitHub times), while they usually do not have to deal with frivolous comments. I have many smaller projects that do get issues filed, but never useless comments.