I am naturally wary of unconfirmed/unofficial reports online and shall remain so. For the Hutcherson report to be contradicted just hours later confirms that I am right to be cautious in what I believe and report. Just the other day a Hollywood filmmaker said to me that 'a lot of what is reported online is made-up stuff' (their exact words).
Curiously, even though you say I should 'call out' the sites whose reports I have doubted you then appear to attack my own site without naming it. For information, I (and my newspaper) get direct contact (via email, phone and mail) from all major studios and their PR firms. We got the Spider-Man casting announcement directly via email, from Sony's UK representatives, for instance. I did a check on my last 50 postings and found that one item was a review (of a Blu-ray), one was derived from a magazine article that i found interesting, 17 blogs were reports of stuff on other websites, and the majority of articles - the remaining 31 pieces - were from items sent to me directly, mostly by email. I get so much stuff sent to me I can hardly keep up with it, being a one-man show.
The bottom line is my journalistic training and instincts (and 20 years of experience in printed media) give me a healthy suspicion of rumours and claims. The internet generally gets away with far more than you could in the printed medium. I didn't want to get personal and start attacking other sites directly, and I generally want to keep it that way. At one time, my digital team discussed whether we should ever give ANY credit or weblink to unverified rumours (at the moment, I generally do name sites on my own site if i bother to report the rumour). For the same reason, most of the printed press do not give a lot of space to 'bomb scare' incidents, simply because those who create the dramas by phoney claims of a bomb are thriving on the attention.
Anyway, that's my stance on the matter. As I'm a trained newspaper journalist, I'm not a typical online blogger so my approach may seem different.
Incidentally, you may want to log and/or investigate the continual database errors that arise when trying to post a comment here. This is the third attempt I've had at posting this.