Mm I know what you mean, people did that to me too. I've been thinking of making a friends-cut for a while & then stopped it, but I think you've inspired me to go on with it for the same reason you had.
that's good! it's not too good to have too many people that are just there to be there, so it's good the people you really want to keep commented :)
i'll try to comment more often, I have to stop going on & off like I do xD