It's done on purpose as 'anti-abuse'. I think it's about as empathetic as spikes put in areas where the homeless typically sleep.

I don't think I believe that. Firstly, in order for that strategy to be effective, Tylenol's deadliness would have to be widely known, which I don't think it is. Secondly, the "punishment" is that you kill someone.

I agree it sounds strange to use Tylenol like that, but the part about adding something that causes fatal poisoning to spite people who might use it as a vice... that's what denatured alcohol is.

We'd rather make something poisonous than miss out on taxes

When I told that governments happily trade lives for money up to a certain point in one if the discussions on HN I was downvoted to oblivion.

I read the deadliness is kept secret (at least in Germany) since they want to avoid using it as suicide pills.

I agree completely, but... https://en.wikipedia.org/wiki/Denatured_alcohol#Toxicity