For some reason, there seems to be an more random downvotings by members just because they can.. So, I often see interesting and on topic answers like yours fir

For some reason, there seems to be an more random downvotings by members just because they can.. So, I often see interesting and on topic answers like yours first being downvoted and then upvoted... I wonder what could be done by pg to counter that? Maybe have a limit of numbers of downvote per day?