For those "downvoting" this comment, please: I wrote it right after my initial post, before any answer, to make my initial post clearer. I certainly should have added this to the main post.

Now that I have all these answers, I understand better. But cant delete or modify this comment. So sadly it's here for eternity :-(

Thanks a lot for your insightfull comments to the original post. Actually, I now think that I will use these method to help getting more feedback from users