Too much customer service?

I came across this article at MSNBC, which asks the question "Can there be a thing such as too much customer service?". Some of the responses, which were collected from Twitter, included:

Katie_Traut: Yes, I think so. Take Martin+Osa. I love their clothes, but dread going in b/c the salespeople all harass you and stalk you.

apfriedman: yeah ... my dealership insists on calling my cell & sending an email survey every time I get my oil changed.

What do you think? Can there be a point when there is too much customer service?