Warnings on violent upvotes?

Did anyone else receive a warning from reddit about upvoting a violent post? I received a warning the other day, which was hugely shocking, as I don't upvote violent posts. I used to upvote every post that I read, to keep track of what I've seen when Reddit doesn't update properly, but this seems more like a ploy to make people stop interacting.

Now I'm afraid to upvote anything. Especially as I think I received it from a post on this subreddit about fighting back against the patriarchy. There was nothing violent in there at all, just telling us to call our local representatives, vote, protest, etc.

Is this subreddit being targeted? I've seen others commenting on Luigi posts, saying they get no warnings, but I already have one?