Forget me right on the blockchain

[inzepockets]

Hello,
quite new in crypto i try to understand how this works, but i am stuck on few questions, maybe you can enlight me?
I will take the example of the datas you can trade with an app like Datum for example. Do i have a right to delete these infos after a while or will they stay forever on the chain?
Same for Dapps for phoning and messaging; on a phone working with a classical network i can delete my messages, and the compagny destroys the datas of communication and messaging after a legal time; but how if it is blockchained encrypted, do we have a possibility  for all these datas to disappear still?

[|Bitkoin|]

Blockchain data is never deleted.

[inzepockets]

thanks, so there is no right to disappear of the net through blockchain..but  one of the bigger 2018 european law inforcement of the "own your datas" that will occur in mid 2018.
i'm not sure how all this will cooperate together.
anybody has ideas, remarks?