There are no magic disclaimers that can immunize you against legal actions in all jurisdictions in the world. Theoretically there are tens of thousands of jurisdictions that might come after you, and you cannot possibly know all of the laws. You cannot even know with certainty what the law is in your own state in the US, because courts are constantly "...
I mean every jurisdiction cant expect that i check the laws of every country/jurisdiction and do country blocks for example, right?
It is your duty to know the law that applies to you. If you make your service/app available in a jurisdiction then you are deemed to know what the law is and you are required to follow it.
For example, Valve ...
Online stores shipping stuff internationally usually include a clause in their Terms along the lines "buyer is responsible for all clearance/import fees and taxes".
What those fees and taxes are depends on:
destination country (the actual tax)
carrier (e.g. FedEx) (clearance charges as the carrier also acts as your customs broker)
value and, ...