How can I handle negative comments on social media, when it comes to customer service?

Thanks for the invitation

If it is your personal account so you can deal with it by different ways one of them is to delete it to prevent the headache and  nervous

but

If it is a business or an official account concerning marketing of products and services Of course, every case is different, but here are some principles to guide the way you deal with negative social feedback as mentioned by  Xabier Ormazabal - Director, Product Marketing.

You can’t react if you don’t know

Be quick to acknowledge

See it from their point of view

Take it out of the spotlight

Say sorry when it’s your fault

Don’t feed the troll

For  more details you can check this useful link

http://www.salesforce.com/uk/socialsuccess/social-customer-service/6-ways-deal-with-negative-social-media-comments.jsp

Thanks

Simply , Delete it ................

Take them to a private conversation where you will understand the issue and solve it, or at least make the user feels valued

Social Media has become so common and favorite source of getting knowledge and entertainment. But every thing has its disadvantages too.

I think negative comments are common on social media. We no need to take them in serious way. if someone is doing this activity, just block him/her 

Thanks for your invitation, Agree with experts answers.

There is no right or wrong technique when facilitating negative outburst via social media. Just keep your head steady with facts with some cynical remarks meant for humor and avoid pointing fingers. Remember, social media is a fickle public forum with everyone is thinking as a judge. Stick with your facts (accurate as possible, of course) and you will just fine!

If a customer has clearly crossed the line and you’ve issued a warning, it’s okay to hit delete or block that person

Social Media have two major factors in terms of Negative Comments:

Reasonable Comments

Useless Comments

I did not mentiond "Negative" because "whatever we do not like goes directly into the charrity box of negativity".  We must understand the thin line between both the mentioned comments, because Reasonable Comments will have almost a valid point with their suggestion, but Useless comments will almost  have comments & comments rather than any Solution. If you encounter such comments try to avoid them and comment only on those which you think have some validity.

I agree with Mr  omar  answers, thanks for the invitation.

thank you for invitation>

we can deal with it depends on the situation>