Yes, propaganda has been around for ages and we're all aware of it. I guess people just naively believe that we're not the targets of it and assume they're impervious to manipulation somehow anyways.
I agree with you that blockchain technology may provide some solutions to these issues but I also see how blockchain tech could be used for nefarious purposes as well. Time will tell. If people see the value of principles of 'decentralization' , 'anti-censorship' and 'accountability' maybe there's hope yet.