Good for you. This is not about what you gave up for your clearances, nor is it about convicted felons. Average Joe citizen might value his privacy both medically and legally, but then by your reasoning it would not be a stretch to put him in the database because there’s always the possibility he might be a felon in the future.
I have already said I am against collection of DNA without probable cause.
I think being a convicted felon is probable cause.
You may disagree, but the citizens of Virginia agree that it is and voted for it.
Do you disagree?
Since that's a typical eugenic way of thinking, it's not surprising to see a Darwinian (allmendream) advocating it.