Don't worry, I'm sure you're not being ignored in any way on purpose; I'm new here myself, but what I seem to have noticed is, the forum doesn't always seem to be very busy, and I've read in some post it may be so because a lot of things happen on twitter nowadays.
I've looked at your posts, unfortunately I don't know the answers to most of them either; what I'm pretty sure of is, there isn't really a fan mail address to which you can mail a printed or handwritten letter. I, too, would love to be in touch with Katy Perry personally - only with 100.000.000 million fans on twitter and Facebook together this is not a wish likely to be fulfilled.
I find on the Internet things easily happen through which you could feel left out and ignored, but in most cases they are just coincidence. In the short while I've been here I made a topic to which nobody responded, but I believe that's simply because nobody had an idea at the moment what to say about it. The best you can do is read a lot on the forum about all the things which might interest you and join in the conversation when you feel like it; I'm sure everything is very friendly here and nobody will be ignored just like that.