3 reverted update
source | link

Yes, definitely -5 for a down-vote for the down-votee, but then I would also "up" the cost to -2 for the down-voter.
The higher cost will reduce the "just feels like it" down-vote behaviour some people are displaying.

EDIT By Sam
Important: have a look at the impact of this change in my post below. -2 will heavily punish serial downvoters (RichB will lost almost half his rep). Problem users do not seem to downvote much. Further more, problem users get a lot less sympathy votes than people think.

Yes, definitely -5 for a down-vote for the down-votee, but then I would also "up" the cost to -2 for the down-voter.
The higher cost will reduce the "just feels like it" down-vote behaviour some people are displaying.

EDIT By Sam
Important: have a look at the impact of this change in my post below. -2 will heavily punish serial downvoters (RichB will lost almost half his rep). Problem users do not seem to downvote much. Further more, problem users get a lot less sympathy votes than people think.

Yes, definitely -5 for a down-vote for the down-votee, but then I would also "up" the cost to -2 for the down-voter.
The higher cost will reduce the "just feels like it" down-vote behaviour some people are displaying.

2 Added important note
source | link

Yes, definitely -5 for a down-vote for the down-votee, but then I would also "up" the cost to -2 for the down-voter.
The higher cost will reduce the "just feels like it" down-vote behaviour some people are displaying.

EDIT By Sam
Important: have a look at the impact of this change in my post below. -2 will heavily punish serial downvoters (RichB will lost almost half his rep). Problem users do not seem to downvote much. Further more, problem users get a lot less sympathy votes than people think.

Yes, definitely -5 for a down-vote for the down-votee, but then I would also "up" the cost to -2 for the down-voter.
The higher cost will reduce the "just feels like it" down-vote behaviour some people are displaying.

Yes, definitely -5 for a down-vote for the down-votee, but then I would also "up" the cost to -2 for the down-voter.
The higher cost will reduce the "just feels like it" down-vote behaviour some people are displaying.

EDIT By Sam
Important: have a look at the impact of this change in my post below. -2 will heavily punish serial downvoters (RichB will lost almost half his rep). Problem users do not seem to downvote much. Further more, problem users get a lot less sympathy votes than people think.

1
source | link

Yes, definitely -5 for a down-vote for the down-votee, but then I would also "up" the cost to -2 for the down-voter.
The higher cost will reduce the "just feels like it" down-vote behaviour some people are displaying.