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You do not have to write "Follow" in a thread to follow it. In fact this does not neccessarily make Facebook show all the updates as notifications. Instead you should click the post's menu button and then click Turn on notifications for this post. See below screenshot.
To help others, feel free to answer other "Follow" posts on Facebook with a link to this page.
We found it annoying that so many Facebook users weren't aware of the proper way to follow a thread. It was extra annoying to get "meaningless" posts like Follow when we were the thread creators. It's normally not the answer one is looking for. We therefore felt it was our duty to inform Facebook's users of the proper way to do it.