I am generally not affected by this type of lie/misinformation, because I specifically look for it. That's not to say I'm never affected by it, just that I keep an eye out for that type of thing.
But I know for a fact that people I know and care about _are_ affected by it, and on a regular basis. Plus it's used to sway people I don't know, and those people vote. And I find it concerning that they will base their vote on incorrect information.
Being worried that they will base their vote on incorrect information is really, really close to being worried that they will vote incorrectly, period. Very few things in politics are so cut and dry that there's one "correct" fact.
But there is a big difference between "voted against X because it was a minor add-on to a bill that was overwhelmingly bad" and "voted against X when it was the focus of a bill; because the candidate is against X". The post in question implies the later, when the former is the actual truth (in my example).
I'm not trying to say someone is voting "wrong", because voting is a matter of opinion. But one should be able to base their opinion on actual truth, not lies. At the end of the day, if their opinion is based on lies they have been told, then it's really no different than secretly switching out the labels on the candidates in the voting machine.
But I know for a fact that people I know and care about _are_ affected by it, and on a regular basis. Plus it's used to sway people I don't know, and those people vote. And I find it concerning that they will base their vote on incorrect information.