I witnessed 4 posts on a stack-feed get down-voted sequentially and in a quick amount of time.
I've been observing this phenomenon for months. Albeit this is the first time I refresh a page in under 60 seconds four posts got downvoted.
I know for a fact that it's extremely unlikely for someone to read that fast!
The downvotes are indiscriminate when it comes to an OP's best efforts or the quality level of content.
After giving some consideration that it could be coincidental, should I send screenshots the next time I see it?