So if you read my previous entry, I laid out a bunch of personal rules for instances where I'd give a submission a zero. Mostly that was just to get it off my chest, because I was frustrated at seeing yet another crappy "beta" submission, and no, you shouldn't adopt the list as your own; each submission should be judged on its own merits, because that's how the portal is meant to work.
When you come across a submission that matches one of those criteria, pay attention to its quality. My news entry was me venting, but I didn't pick the things I included there at random. With the exception of the work-in-progress one, I'm pretty sure you'll find that the vast majority of submissions that match one of those criteria - and damn near 100% of submissions that match more than one - are bad. Don't take my word for it - never take someone else's word for something you can test yourself - but pay attention. The trends are out there.