I've definitely told people this in the past and had negative reactions ranging from the mild disbelief "You're serious, how can that be possible? I don't believe you" to the outright offended "What is wrong with you (as a person)? Why would you want to spend so much time sleeping? That's wrong and ridiculous behaviour".
I do find it curious how some people tend to get really uppity about this issue. As though one's sleeping habits are reflective of character and morals, or something, rather than just being a natural trait which differs person to person and which one has no choice in. Where does this come from?