I believe that this artwork (this applies to all of the artwork of this type) is completely fine. In no way does it ruin any instance of your relationship with the show itself. In my personal experiences of seeing this kind of artwork I've found that none of it has changed my view on the show at all, if anything at all it may have enhanced the relationship!
If you want the fullest opinion on this kind of artwork, I think that there should be more of it. Obviously if there was more of it we'd have to block it from the general public a little more, but whatever people feel like drawing is what people will feel like drawing. You can never change that. Don't ever let anyone change your style of drawing! Take it and go with it!