Greasemonkey Netflix Comment Field

Alright, first of all, I have no experience with scripting. I really know nothing.

Anyway, I'm wondering if this would be possible to do. A greasemonkey script that adds a comment field on Netflix video pages where you can see and add to comments left by other users of the script.

Also, how much it would cost to host the server for the comments and how to go about getting it done. Remember, no scripting ability and most likely unable to learn.

Also, your thoughts on the idea. Personally I would love for this to exist, which is why I am asking.

Really, you don't think it would be popular? I'm pretty sure that comment fields are pretty popular.