No, they are not. Feel free to delete with reckless abandon!!
Yes they will be notified
When someone adds you as a friend on Facebook, you have the option of accepting their friend request. When you send out a friend request, you are notified by Facebook if that request has been accepted.
yes,Facebook send email notification if you can cancel a friend request.
No, there is no way they will know you ignored their request.
Yes, they will see that they are not your friend any more. Or that your not on there friend list, but they will not be notified.
The Facebook can delete her/him from facebook if he/she has been reported few times. You can remove a friend from your friends list by going to a friend's page and at bottom left corner there's a Remove button.
No. But if they don't get a confirmation that you accepted them, they'll figure it out alone...
No
no
like this @+[+idno+:+] remove +.. Bd.Dohar.com
No
No. they will not