We pay for what we use to create but we dont pay for what we create, it should stay that way. They can argue that we are making their stuff more easily attainable illegaly, and we are, but the person who muxed the song from your amv to use another way is the one doing something illegal IMO, make him pay instead of all of us.
As for the anime aspect, I think thats moot. It's really hard to get all you want to see from an anime through just amv's if not impossible. If anything they should make you more interested in buying them and they do alot for me, same with the music actually.
All so, if you let them tax you here for something you've created who's to say it stops here? Next we get taxed for drawing/painting things we don't own.






