Yes I hate it...it's so annoying. And the reason is this...
I find Facebook can also damage relationships...especially when you are 'dating' someone. It simply reveals so much of yourself to other party/interested people at times. It maybe fun in the beginning but they/you get to see EVERYTHING about that person, so the relationship doesn't become meaningful anymore. So now as a habit I simply don't add people I don't know...period.
If you really wanna get to know somebody...I suggest try getting off the computer lol.
Most of the time I don't even notice. If I do notice, I don't really care. It's slightly irritating when it's someone who sent me a friend request and then a couple months later they unfriend me. It's like, why did you even add me in the first place? But really, I don't care. There's only a handful of people I kept in touch with after high school and no one from college is on my Facebook. So it doesn't matter.