Yeah, I get those types. Pretty sad. I mean, when I follow someone I kinda hope they'll follow back, but I don't check up on them and I certainly don't unfollow them just because they haven't followed me. What would be the point of having loads of followers if they only follow you because they felt obligated to? It's not going to help you promote yourself or something you're trying to sell, because your followers aren't necessarily interested in you/it at all.