I add people.
Only people I know in real life, and have known for more than 1 second, but other than that I assume they will be delighted to see my awesomely interesting status updates...
Plus I often forget if I have added someone, so I don't dwell on it if they don't accept me. And there's a high chance that, if they ignore me, then I'll re-add them as I won't remember that I added them in the first place.
Sooo.... it works well for me, being in my happy little bubble where no one has rejected me.
But if there is someone (multiple someones?) out there who keeps hitting ignore, and I keep adding (like an endearing tail wagging labrador, I think, not like a stalker at all...) then I do apologise.