Definitely great stuff. You are an artiste!!!
Like many others, I can have a problem with relics being destroyed, but also realize that instead of a fine line, it can be more of a thick line.
First off, people are free to do whatever they please with their possessions, so there's that. But also, it's not like every single autograph is on some truly significant document, so I don't see a lot of harm there
(of course, what signifies a 'significant document' probably varies wildly among people), unless shown otherwise, so your work really enhances the autos and gives them a more enjoyable life, so to speak.
Also, unless we've seen the original piece the autograph was on, we have no idea what made it a ready
(and proper?) candidate to be sliced and diced. I would have to imagine
(with exceptions, duh!!) that the very vast majority of them come from more 'throwaway' items and such.
(Stepping off of my soap box now.) 
Again, very impressive creations!!!