@MartinSleziak Your downvotes statistics probably should be normalized to account for changes in traffic. For instance, the downvotes / upvotes ratio would make more sense as a measure, in my opinion. — Federico Poloni 2 hours ago

@FedericoPoloni I have tried to make a query with the ratio you suggested: data.stackexchange.com/mathoverflow/revision/1020046/1259834‌​/… If there is more SEDE related stuff, we can discuss it in chat. (I suggested chat mainly because I do not want to digress too much in the comments - so that this does not become a discussion about SEDE instead of the original topic.) — Martin Sleziak 18 secs ago