I hope not, because once I have read the question and answered it, I only keep following it if I want to hear other hubber opinions. In fact, I think there is a place in your profile you can set so it doesn't automatically follow a question. And even below the answer, there is a box I can unclick if I don't want to follow the question.
I generally do follow the question for a couple of days after I post an answer, just in case someone says anything directly to me, but I will stop following after a couple of days.
I do keep following my own questions - after all, I want to know the answer, and it would be rude to ask a question and not listen to the answer.