In many cases discussed here the police will come out and say they have received several calls/emails/letters about what someone's theory is about a certain case. Every time LE says that I do wonder if it is someone here at WS.
Here at WS there are indeed some great detectives/sleuthers and have helped solve cases before buy finding actual evidence. I am constantly amazed how talented so many are and the great abilities they have to rundown evidence.
I think if the blogger came from here they would tell us. Several on WS do write blogs.
But speaking about theories.
I remember during the Scott Peterson case the Prosecutor said he received several letters from those who felt they knew what happen including where Laci's body was because she wasn't found until four months after the murder. This was before SP was arrested so it probably does happen. During the trial itself the Judge had to stop the trial one time and hold a hearing because he had received a letter from someone saying their dog told them who had murdered Laci. That really happened. Even though they knew it was ridiculous they did have to discuss it and get it on the record. I imagine others in law enforcement have received some doozies/tips/theories from others (not from here though) who think they know what happened. I imagine some of them don't even live in the same state but do it anyway. They may be the kind that thinks they are smarter than the investigators on the case.
I can certainly understand alerting police if someone is aware of evidence that may help any case even if the person doesn't think its that significant. That should always be done but when LE says they get tips that actually wind up just being theories then I think that is wasting the officers' valuable time. And it seems that is happening more and more nowadays.
I have never done so myself but if I had actual knowledge of some type of evidence in any case I certainly would let the police know it immediately. I think all of us at WS would report it to the police because we know how important these cases truly are to the victims and their families.