The other response, from kibwen acting with the moderator badging enabled, is more nuanced:
https://www.reddit.com/r/rust/comments/13tsmht/jt_why_i_left...
Do read the full thing, but it roughly boils down to "If it happens at a time/on a day of the week when we have more moderator bandwidth available, we will make use of it to be more lenient. In the worst case it escalates to targeted harassment, and I promised myself to never let another 'Actix developer harassed into hiding' incident happen. Was it heavy-handed? Yes, and I wouldn't do it lightly. Also, I expect that anyone who really wants to know what was deleted can go to Reddit mirror/archive sites and the case you're referring to was the first time I had to act since Reddit surprised them by shutting down API access for the Pushshift service they relied on."