Honestly mate you've got a really good point with this, I will not attempt to justify whether what we've been doing is right or wrong I just feel that everyone has their own opinion towards this situation. I myself have enjoyed the past 2-3 Days but begun to realize that's it's just getting increasingly more fucked up as it goes on. He's been non-stop harrassed, doxxed, linked things (I will hold myself accountable for that), and a few more things as well.
I will admit that at first, it was very fun messing with him, then I began to feel a bit of sympathy for the guy. He even announced in his discord that he'll be taking the day off due to a Mental Breakdown, and would like to come to the forums to see what this is all about. He may not be the most likable guy or even the smartest on the platform but he still is another human being and feels what others feel.
You're right with "he may hang himself because of the harassment" because it is a good possibility, he may struggle with depression and just not really seem that he does by the way he acts. There are many who fear to show they feel that way because they don't want others to worry. But with what we've been doing I've begun to slightly worry about a complete stranger and what he could do because of our actions. At this point, I think it would be a good time to call it quits but I don't think the rest of the community would see it that way.