I just wonder how it is possible at all to protect a decentralized database? 
I can understand how to protect a server, you can do in a good or in a bad way, but is clear.
I can understand how to protect a server, you can do in a good or in a bad way, but is clear.This is a question for a programmer or even for an hacker, I just know that is bit more diffult to alter data in a decentralized blockchain, but we're talking about privacy that is something different.
to alter a some data in a bloackchain is diffucult beacuse the work to do and most important the costs in terms of power and computation is disadvantageous for the one who try. but I think too that privacy is a different matter.
just joking, the risks are real but it just a discussion that, I think, aim to be constructive. 
oh, I almost forget it. they are about to close they slack account because in the social in general, and not in this particular case, there were some frauds.
so it is good that (a) they left slack if they had some doubts and (2) if they have some security methods on their platforms to avoid those risks.