What should a founder do? Focus on their product, the better they become more scamers will attract, but is for the user to use some basic logic.
Otherwise, should they tell people that there is no such thing as Nigerian Prince? Because Nigeria is a Republic but some people don't even check the basics, they tend to just refuse their responsibility.
People here forget that the average person (especially as they age) will at some point fall for a scam. Insurance companies are starting to recognize that, because as you approach old age and death, apparently the mind gets more trusting of strangers to reduce mental load.