I personally, don't think it matters one way or another...the only reason to accept a "friend" request is so their avatar is in your friends list in your profile, so you can easily follow your new "friend". I don't think accepting the request would make that person start "cyber-stalking" you. Normally, a friend request is sent to someone that you admire what they've written, or you agree with most of their opinions, or find their
sense of humor enjoyable. Kind of a "like-minded" friend, not a true real life friend that you would hang out with at the mall or something. Although I'm sure some people that communicate regularly can and do become real friends off line.
It's a perception thing, and evidently you don't see the value in it, which is fine by most of us here. However, if I really enjoyed someone's posts and agreed with their comments and thoughts and requested them to be a friend, it may hurt my feelings a little that they didn't want or need my good opinion of them. It's not a BFF thing, just an admiration thing in my opinion. If you don't want to be admired, or don't want to know who finds your posts and thoughts similar to their own, then reject it by all means. It's your choice, don't do anything that goes against the grain just to please others. It might even be best, if you really feel that the friend thing is lame, to make a note in your profile of your feelings towards that. This way, they are forewarned and shouldn't get their feelings hurt when you reject the request.