No. Even if it does nothing else, it signals politeness, affability, and adherence to accepted custom. If done well, it also makes your interlocutor more favo

No. Even if it does nothing else, it signals politeness, affability, and adherence to accepted custom. If done well, it also makes your interlocutor more favorably inclined towards you -- in any case, it at least gives you the opportunity to make them more favorably inclined towards you. Besides, you could make a friend.