I know I have suggested this in the past. I ended up disabling "likes" for posts, since I could not moderate them but there are other ways people can like, which overrides our settings/wishes. At least the undesirable ones are not visible to my readers any more.
I've just learned to live with the followers, but it would be great if I could remove those I'd rather not have. It's one thing to have a blog public, which they could see, but it is another to have your posts go to their inbox, if they use email notifications. I don't post about my personal life, so I suppose it isn't a big deal...
Many of them appear to just want hits to their site, not once making an effort to communicate on my blog. I suspect the same is true for the "likes". Unless they leave a comment, I rarely visit their sites.