And these situations wouldn't happen if the repo owner would do his own QA as he/she should, which the original poster said was impossible for some reason... and I still haven't heard anyone explain why it's impossible when plenty of other external repositories do exactly that. (The repo owner being lazy isn't a good reason.)
Also, if Extras is so easy to get into, we're going to come to a point where QA won't be so minimal anymore because there will just be a flood of apps coming in. At some point, it'll need to be capped... and when that happens, someone's probably going to start another repo.
This feels like a microcosm of Linux itself, doesn't it? Why isn't there just one distro of Linux?