In the age where security is tough at airports one should be prepared. I cannot understand the fact that some people who fly frequently yet seem to forget that the security checks before you get to board a plane is pretty thorough these days. Especially on international flights. You have to remove anything and everything metallic and not attached to you - watches, jewellery, wallet, purses, keys, bags etc. All of these items would have to go through a x-ray scanner and you would have to then pass through a metal detector and may be patted down too.
So you should make things easy for yourself and to others.