There's nothing to forgive if someone pukes on a lawn. What harm have they done? That doesn't even register on my radar.
If someone pukes on a lawn it can damage the lawn, or at least ugly it up. Some people go to great lengths to maintain a lawn, and much like I wouldn't litter in it, I wouldn't puke in it.
I disagree that sober adults make bad decisions constantly. I think there are plenty of tough decisions in life where one option was as good as another, but on a day to day, most people are pretty successful. How many bad decisions have you made in the last month?
I've made plenty of bad decisions in the past month. IMO, if you are unaware of your own bad choices you are not analyzing things well enough.
I'm not even talking epic fuck ups or anything like that, as most people will analyze their epic fuck ups. I'm talking about smaller choices, like the wording I've used to address a subordinate, or staying up too late watching fights and then being tired the next day, or like last weekend, where I underestimated the amount of snow melt and ended up driving a good distance to a river that was unfishable.