The first slippery slope for this was when people made tools to do deep packet inspection and find copyrighted content during the Napster era.

That was the first sin of the internet era.

Discussing slippery slopes does nothing.

Edit: It is frustrating to see where we are going. However - conversations on HN tend to focus on the false positives, and not too much on the actual villains who are doing unspeakable things.

Perhaps people need to hear stories from case workers or people actually dealing with the other side of the coin to better make a call on where the line should be drawn.