More importantly, how can these accounts subtly direct the generations to instill modern ideology or politics into "historical" images, giving them historical credibility? Think of all the subtly white supremacist "retvrn" accounts, for example, falsely recontextualizing inventions and accomplishments to support their ideology.
We all need to be thinking much more creatively and cynically about how these tools will be abused. The technology will get better. The people who want to abuse it will get smarter. And your capability to distinguish fake information is likely much worse than you believe - to say nothing of younger people who have less context and experience to form a mental "immune system".