為什麼 Google+ 中的信息流只有 +1 而沒有 -1 的按鈕，以後會有嗎？

01-21

+1按鈕表示贊成，為什麼沒有-1表示反對的按鈕？

產品最好能夠傳遞出正面和積極的價值，鼓勵建設者，肯定者，讚美者。

增加一層複雜性對於社交網路有很大的不確定的危害性。

+1本身表示贊同。不+1自然就會沉沒下去。沒有十分必要多此一舉！

G+不是公共空間，所以-1沒有意義

在Facebook，Google+上，你能看到的內容都是你選擇的，不喜歡就不要fo，為什麼還要多此一舉的搞一個-1.

我不想說

+和-是相對的。相反，也可以只有-1么。

我覺得+1就夠了。如果大多網站用到+1。那麼沒用到的就相對來說是-1了。

多了-1覺得有點多此一舉，除非Google用單獨一個頁面，和digg和reddit那樣對信息流進行排名，不過分類處理有點麻煩。

既然是反對，那麼何不在評論中寫上為什麼反對的理由呢？

這就像為什麼facebook沒有unlike的按鈕

認可就按+1，不認可也不要設置一個 -1 去打擊別人的積極性嘛

-1 也容易讓人人為地去搞破壞

認可,即+1.

不認可,可以不按嘛.

1樓說的對.重複太多,感覺很累贅.

我覺得這個問題和 Facebook 為什麼沒有 Dislike 按鈕是相似的，Quora 上有這一問題的答案。http://www.quora.com/Would-Facebook-ever-add-a-Dislike-button-Why-or-why-not?q=facebook+unlike

個人比較認同這一答案：

Brittany Darwell, Facebooking is in my job description.

5 votes by Chase Darwell, Mike Madden, Murtaza Ali Akbar, (more)

The amount of information gained by a dislike button will outweigh what I see as exaggerated potential disadvantages.

First, what are the benefits of a dislike button?

Good for users

Facebook like and dislike would become a simplified rating system for all products, places and media across the web.

This is good for people who will increasingly make decisions based on recommendations from their social network. As it is now, when go to Yelp or Netflix or Amazon, I might see that a few of my friends like a restaurant, movie or product, but what does the absence of likes mean? Does it mean my friends dislike it, feel neutral about it, or that they are unaware of it? Dislike adds another category without overcomplicating the system, which would prevent people from responding at all.

Good for Facebook

Knowing what people do not like gives Facebook even more information to leverage in unique ways. I see a dislike button as one more advantage Facebook would have over Google in both search and ads.

A dislike button would also increase engagement on Facebook and connecting sites.

Good for Brands

Facebook ads are great because you can target people based on declared likes and interests. Imagine the possibilities for advertising to people who have declared dislikes. You could serve unique ads to change their minds about a product or you could pitch a competitor.

Facebook has been revolutionary for brands because it creates a direct line of communication with fans. A dislike button would connect brands to people who don』t like the brand or a particular product. Think about what you could learn from these people. Wouldn』t it improve products and services?

Now, thoughts on the main arguments against a dislike button:

Dislike will make Facebook hostile

People overwhelmingly use Facebook to connect with people they know. Just because a dislike button exists, doesn』t mean people will start giving thumbs down to their friends』 shared items. In fact, you might think twice about being negative at all if you knew your friends would see it.

Either way, I don』t see people being bothered much by the dislike button. YouTube has a like and dislike, and though the anonymous comments occasionally get vicious, it has little effect on overall use of the site.

Dislike isn』t social

Mashable founder Pete Cashmore recently wrote, 「While Like buttons connect Facebook users to their interests, Dislike buttons serve no such purpose. Like buttons are about connection; Dislike buttons are about division.」

However, millions of people have already joined Facebook groups and pages about things they dislike. Do a search for 『I hate』 or 『sucks,』 and see that people doconnect based on common dislikes.

SNS本質上是鼓勵用戶UGC，相反的激勵自然會被弱化處理了

好問題！不過放在中國的水軍太多，+什麼都不容易那麼純潔。