I do think the younger generation growing up now is less likely to read one of those chain letter thingies on Facebook and believe everything it says like some people clearly do.
For me, it's a much bigger problem than chain letter thingies on Facebook. For example: the Trump campaign was spending 1 million dollars a day (just digital ads) to try and influence susceptible voters in the final weeks of the election. That's before you consider the influence over other media.
Spending lots of money in a very targeted way is a winning tactic, but I have two problems with it: using lies (propaganda) to create your desired behaviour change and ensuring a level playing field for all candidates/policies (spending limits).
Vote Leave had a winning tactic/team, but they lied and went over the spending limits.