OK - call me childish, but Factorio is a one-off payment of £35. There's no danger of spending more money than that, so the only thing you'll be wasting is your own time playing it. It's an over-reaction to characterise it as posing some kind of life-threatening danger.

Play a lot of Factorio and yep - you've wasted a bunch of your time (ask me how I know :-) ).

100% agree. My friends and I have played WoW on and off since release, and I never thought much of it. I could easily step away from it and used it mostly as a way to keep in touch with that group. We recently found out how much of a toll it has taken on one of ours friends lives who has pretty much always played even while the rest of the group was taking breaks.