For those of you that go and talk to the deceased, I assume you don't think that's where their spirit is right? I mean if that was the thing, would they be more likely to be where they lived, died, or are buried? To me if you believe you can talk to spirits, then you could do that absolutely anywhere. So to me a grave is about other things, and it doesn't matter what my opinion is there.
I would consider myself a Christian, so I believe in spirits for sure. But I don't pretend to know anything about the afterlife. I talk to my Mom anytime I see the clock read 10:10, 11:11, 12:12, etc. But that's for me, and my memory of her. Mostly it's just a simple, I love and miss you!
Interesting thread topic.