It wouldnt be that hard to script this if you already had a bunch of accounts and were just copying existing threads. What's interesting is that there were no other people accidentally joining in at any point. So either this was done by reddit and the timestamps are all 'fake', or this was done at a weird time in a niche community with low engagement.
Either way it's either astroturfing or someone farming up the karma in their bot farm to make them more attractive for sale (to get around comment/karma minimums)
Once more, I'm literally not injecting an opinion here or arguing for or against anyone's point. All the articles here talked about counts of individual accidents with zero context about sample size, something that is absolutely crucial to establishing exactly what you're talking about, rates. You can shit all over that, and then pretend you didn't, but Im only pointing out that the math doesn't work unless that context is there.
(I find it funny that the article you just posted is literally an ad for a traffic accident lawyer: here's the study the ad is citing. The ad did some creative interpretation on those numbers, ignoring things like DUI's for example: https://www.lendingtree.com/insurance/brand-incidents-study/#:~:text=Tesla%20drivers%20have%20the%20highest%20accident%20rate%20compared%20with%20all,over%2020.00%20per%201%2C000%20drivers.)