I fully understand why and how you feel that way. I too have at some point felt that way. I don't now. My own beliefs won't allow me to make a mockery of any God fearing religion, for the sake of teaching, or sending a message. That is barbaric, and not Christianly in my own estimation. The mere thought of tainting someone in their death, or burial is appalling to me. It doesn't matter in the end, they go where they go due to their deeds good or bad. What we do to them before or after their deaths will not have any effect on that. It does have an affect on those who do it. It is a sin to do so. I have more than enough sin to answer for when my time comes. Also to do this, is enough to further outrage that society. I say, for that reason, make them live with themselves. Do not mock their religious beliefs, but instead, use their own forms of punishment against them.
I'm not trying to argue, just want you to understand my reasons for what I believe. Like I said, I fully understand where you are coming from.
And, for the record. If for some reason someone puts the satanic verses, or the "black' bible (Satanic) in my grave with me..
.. I'm coming back to haunt the living sh¡t out of them.