Can you stop Facebook from publishing your comments/likes to Newsfeed?

[Sarah]

Today I asked a question on a business's Facebook page about a product I'm interested in purchasing.
To my surprise a friend was able to 'like' my comment.
This friend is in no way connected to the site I was interacting with.
How can you stop this from happening?
The comment didn't show up in my own Newsfeed or my wall, so I assumed none of my friends wouldn't be able to see it either.
I had 'show in Newfeed' checked because I want to get updates from the business in my Newsfeed, but does this also mean that every one of my friends can witness all my comments to the business?.
I don't really see the point in publishing everything someone likes or comments on.
Is privacy even possible on Facebook?

[NOOOO]

I don't think you can because your comment is on a public page.
You MIGHT be able to if you look around on privacy settings.
Or check the options for the comment/post before you post it.

[Harry Potter..]

Just go to face settings from top right corner.. There are three options to share ur stuff with.. Chose 'only me' or custom...

[Tim Tebow here]

Privacy on fb? Are you serious? You know fb is for losers right?

[Angeleyes]

Go to your privacy settings and change your settings to 'only me" or select 'don't show in newsfeed".
There isn't much privacy on facebook anymore.