Downvote is always good and continue to be a an excellent feature. But please have look on the following points :-

(1) Has any donwvoter downvoted with out the looking at the SP of the user before downvoting. probably NO, because it would lead to be flag war from either side.

(2) Downvote is mostly used as a weapon to exercise it again the weak(less SP steemian) and cheetah is also not fair in its part to downvote, because it somehow overlook some spammers and downvote some spammers.

(3) If someone is downvoting without being biased then it is good for this community but that has not happened on a broad scale so far.

Thank you @timcliff and for the first time I can see some good and interesting article.