First, the most vulnerable population, seniors usually don't have smart phones and/or access to the internet. They get all their information from the nightly news, local newspapers and word of mouth.
Historically, white settlers arrived in America and willfully infected Native Americans with blankets with smallpox added in.
Historically, several black men were tested without their knowledge or consent and left untreated for syphilis (Tuskegee Experiment).
Historically, many parents have allowed their infants to be vaccinated who later went on to develop some cognitive impairments.
There's more of the same out there for anyone that wants to delve into it. My point is simply that I don't necessarily consider someone to be crazy or stupid because they don't feel comfortable getting the vaccine. And, having these bizarre giveaways, contests, free beer, financial incentives, etc. makes it even more suspect.