It bugs me that so many posts on HN immediately get shot down with "It's not safe", which is not constructive at all.

(see: self driving cars, drone delivery, etc.)

Just saying "it's not safe" is not useful, and I suppose I wish people would do it less. Yes, safety is a consideration for sure, so a comment that talks at length about how to make it safer is useful. Simply saying it's not safe is not constructive.

We should have a HN tofu meetup