The option is that they work to the laws in the country they operate, they already do on some of the examples you give or they wouldn't be allowed to operate.Ok, but in which country do you think a multinational operates? The answer can't be "all of them" because of the conflicting laws across nations would be an impossible bind.
Pretty simple in concept, though a bit harder in practise.
NZ has laws around how old you have to be to appear in pornos, age of consent, what is objectionable material and so on. If you operate a chat room in NZ then you either watch for such material and make sure it fits within the law, or you risk your equipment being seized and you having a nice chat with the fellow in the blue uniform.
If your service is reachable in NZ but your hardware and personal are elsewhere, and you seriously fall foul of the law, expect extradition proceedings to be commenced, or at least your own government to be asked to look at your activities.
If you wish to trade with people in NZ, you trade under NZ law. If you don't wish to trade under NZ law, you don't trade with people in NZ.
Biting the hand that feeds IT
