Can I just paste content from Word?
The most likely complaint you can get after launching a Joomla site is, that the owner calls you or mails you, saying, that the page is looking weird after he added his first content item. Blindly you can bet, that he (sometimes despite your warnings) just copy/pasted that content from a Word document, another web-page or some other word processor. The order above isn't an arbitrary one, BTW! What you can do? Humm, you can clean his content item, but you must make them understand, why isn't a good idea to do this, and you must provide them with an alternative: an easy way to paste from Word without damaging (badly) the site.