I know, I just have caution from being tracked between threads so someone could carry on a pointless harassment. Thankfully, that ceased.
I think, if possible, it would be good for the user themselves to have some control over whether they want subscribers or not.
In general, I like the idea, especially if is for new threads, not just all posts. There are certainly some users here that post things I consistently like and I would like to be able to know when they post something new.