I don't like this way of thinking as to some extent you're relieving a person of responsibility for their actions. I know that the concept of free will is questionable at best but life is greatly hindered unless you act under the pretense it exists. In a way not allowing people to have responsibility and accountability for their actions is a great disrespect.
have you tried acting under that idea (the "There but for the grace of God, go I" principle -- obviously the god part is unnecessary but that's just the phrase that best encapsulates it)?
if so, how have you found that it has hindered you? specifically?
if not, how can you know it will hinder you ahead of time? it doesn't seem to hinder me. i not only don't believe free will exists, i don't act under the pretense that it does