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It's legitimate to worry about this, but as long as funds aren't at risk (which they aren't in this case), it isn't too bad. ChainBB is a reputable project, it's super unlikely to have anything bad happen unless, worst case scenario, they got hacked somehow.

Someone could post and vote in your stead. Until you change your posting keys. (they can't touch your funds)

Cool, thanks for the info! Checking it out now!