How to block some friends from commenting on Facebook?

[mountaindude]

Well there are at least two things you can do.

A) Block the person/people. Ask yourself if you want them to not be able to see your profile or anything that you post. If you want to block someone, go to their timeline, go to the upper right section where it says Friends, Message and then click on the Gear symbol. Then go to the bottom and click Report/Block. Blocking someone wipes them of your view of Facebook, so if you block someone you will no longer see anything related to them, basically.

B) If you still consider these people friends but don't want them to comment/see certain posts, I believe the best alternative for this is to create lists and then post a status only to people on that list. you can easily add and remove people to lists on Facebook. Some preset ones are Close Friends, ______ High School/College/University/Workplace, Acquaintances, etc.

I am not an advocate of Google+ (G+) by any means, but if you truly want to control who you post to and your privacy settings and are looking for an alternative to Facebook, Google+ is an great alternative.

Hope this helps.