I want to delete some friends from Facebook without them noticing. Is that possible?Is possible at least to hide them from Facebook chat?
How to ignore a friend on Facebook?
facebook;chat;friends
If you remove someone as a friend they will not be notified, but they may notice that their friend count went down and that you are no longer on their list of friends.To hide someone from Facebook chat, see How do I stop someone from seeing me on Facebook Chat?.To hide their updates from your News Feed, move your mouse over one of their updates in your News Feed and click on the X that appears to the right; then click the Hide button.  Alternatively, when the News Feed is set to Most Recent, scroll to the bottom of the page and click Edit Options and type their name in the Hide box.To hide your updates from their News Feed, go to Account  Privacy Settings  Customize Settings and change Posts by me to Customize.  In the Hide from these people box enter the person's name or a friend list.You can also alter other Privacy Settings to make these people similar to non-friends.  Go to Account  Privacy Settings  Customize Settings and change each setting that is set to Friends Only.  Choose Customize and in the Hide from these people box enter a name or friend list.  If you do not allow them to see wall posts by friends then they will not be able to post on your wall either; they may notice that if they go to your profile.  They may also notice if you do not allow them to comment.  If you have some of your Basic Directory Information or album settings set to Friends Only then you may want to update those settings as well.  Use the Preview My Profile button and enter their name if you want to verify what they will be able to see on your profile.  However, it sometimes takes some time (a few hours) for changed settings to propagate.Unfortunately it is not possible to revoke all of their friend privileges through the Privacy Settings.  For example, they will still be able to tag you in their photos unless you remove them as a friend.