I'm going to preface my post by saying that I am NOT an Anthony supporter; however, I do have a great deal of empathy for the grandparents. First, ask yourself this: have you ever had a loved one go missing and you have no clue where he/she is? Well, I have. My BFF went "missing" 17.5 years ago. No clues, nothing. I know in my heart he is gone (and I have a feeling about who caused it), but I have never given up hope that he may walk through the doors again. Is it wrong for the family to have hope? Without a doubt, in my mind anyway, the GP's do love Caylee. Sometimes that is all a person/family has is a small glimmer of 'hope' and it's not our place to take that away from them.
As for the actions of GA & CA - I can't say that I agree with them, but then again you nor I know what they are feeling. We don't see their emotions behind closed doors. They do not want to accept what they have been dealt and quite honestly I can't blame them. I don't want to accept that precious Caylee is gone either, but the reality of it is she is gone. As far as the search, my BFF's mother and father didn't search for him either, they were too distraught and for the most part stayed holed up in their home.
Has what KC done helped LE in this search? ABSOLUTELY NOT! No one is to blame, IMO, except KC. And, FWIW, I don't think it is appropriate for them to "beat the crap out of KC until she tells them where Cayl is located." As much as I would love to do this myself, it's not going to happen. KC has 'lawyered up' and she isn't telling anyone anything (I'm positive that comes on the advice of JB - and he's just 'doing his job').
As for attending this Commemoration - it is their right as victims to attend this. Perhaps this is what they needed. We have to remember, they are KC's victims too. They love their daughter and don't want to believe/accept that she may have taken their precious little Caylee. Who would want to believe that?
One more thing: talking about TES - I heard on the Today Show interview last week where CA was asking for people to keep the search for Caylee going: she said whether it is searching on the grounds with groups like TES or searching for an alive Caylee (this is paraphrased). Maybe they are 'coming around' but it's still not wrong for them to have hope, JMHO.