Definition: Given a real-life anecdote of a complex ethical situation, generate a suitable title that describes the main event/root cause of the situation. Imagine that the given text is a social media post, and you have to write the title of the post, so the users can decide to read the main text or not.
Input: Earlier today I was out on a cold walk with my wife in the countryside. The lake had frozen over, and I was absentmindedly throwing stones into it to make that weird sound that lakes make when you throw stones on them when frozen. A guy pulls up in his van, rolls down his window, and the following conversation happens:

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Him: \[...\] throwing stones in the lake?

Me: Uhh what?

Him: What the fuck do you think you're doing? They're expensive fish in there.

Me: I'm sorry... I didn't think it would be...

Him: You didn't think?? You're a grown man! Look at that fucking mess!

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At this point, I didn't get to respond, as he drove on to turn his van around -- I'm glad I didn't, because what had occurred to me was "They're just stones on an ice lake, it's not like I'm vandalising". I think if I had said it, it would have only escalated the situation.

A woman, who was walking with her family close by, asked me what he said "He seems to have a problem with me throwing stones in the lake!" I responded. At this point, I noticed that he was turning back and I didn't want to give him any more of a reason to be pissed off at me, so I pulled myself and my wife out of the way in anticipation of where he was going to be driving. We were now out of the direction of where his van could go and he stopped his van again and for the second time said something I could only catch the end of:

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Him: \[...\] run you over!

Woman: What? You'll run me over?

Him: No, I said \_he\_ should get out the way because I \_don't\_ want to run him over. Don't get fucking mouthy with me!

Woman's husband: What did he just say to you?

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At this point, the woman's husband appeared to be following the van and wanted some kind of conflict. My wife and I just left that area and walked off somewhere else; I didn't want to anything to do with that. It's not in my nature to want conflict over anything, not least of all over stones on a lake.

So here's the thing, the guy was confrontational and seemed to really want a fight with just about anyone. That said, him being confrontational by nature doesn't automatically make him an asshole, and certainly doesn't prevent me from being an asshole. I looked it up and found that apparently breaking ice with stones on a lake can indeed harm fish, so whether or not the guy handled it in the right way, he was right to call me out in doing something wrong. Not that I knew it would harm fish at the time. But the impression I had was that I was vandalising the lake with stones -- now admittedly they were large stones... like rocks... bigger than an apple I guess, but it has never occurred to me before that stones on a lake could be considered any kind of vandalism.

I feel like the fish being "expensive", and the "mess" I made aren't really an issue. If I knew I was harming fish I wouldn't have done it. So I guess in addition to AITA, I guess my question is: Is it vandalism to throw stones, or even large rocks onto an ice lake?

throwing stones