You think they store the address and phonenumber in the blockchain? Ah, I guess that explains your reaction. Perhaps if you'd explained that fear in the first instance...

I can't reassure you on that, as to tell the truth I assumed it would be better organized, and in any case I plan to move soon, so the details I gave will become redundant before too long. Personally, for what it is worth, I doubt the details are stored in the blockchain, and if they are, I doubt they are stored unencrypted. That would be really bad design.