Just to scare you, .com domains are controlled by USA, so if Uncle Sam sees something he doesnt like he can have it taken down without asking you.
But if you have a .co.zw Uncle Sam have no power to do that, instead it will be th Zim government which can take it down if they dont like it.
In other words, the last letters reflect country of jurisdiction the domain resides and you should know rules which governs websites in those countries so that you dont fall fowl to the law.