When I was working at a big blog, the major takeaway I got was that everyone will be engaging in an inevitable attrition war. And in that war, many will pull some crazy shit to get to the top. The sites themselves need to continuously generate pageviews day after day. They need to posture and project that they're more and more influential. The biggest offender, consistently, has been TechCrunch. They publish stuff that has explicit no publish requests, they break embargoes that hinders around real businesses' launch times, and they censure over petty beef with another tech blog.
Oh, don't forget the fact that TechCrunch is no longer about startups -- it's the new CNet, without the class and without the journalistic integrity.