I've noticed an increase in down-votes recently. Most of these are not accompanied by any explanation of why the questions or answers have been down-voted.
A lot of users provide helpful comments (without down-voting) suggesting how questions or answers could be improved. An unexplained down-vote does not do much to help improve questions or answers.
I think that down-votes should be quite rare on the Mathematica SE. This is perhaps different from some other sites where down-voting a buggy answer is helpful to sign-post that this is not an approach to use.
Is there anything we can do about this? (Perhaps post a question on meta suggesting that those responsible think again?)