What's the worst scam you've fallen for (or gotten close to falling for)?

When I was 16 I looked a bit older, so people would often assume I was over 18.

I was in Boston one day wandering around and I was approached by someone who wanted to give me a free personality test or something. He was handsome and I was a young gay boy so I figured why not?

It ended up being a scientology recruitment. They freaked and stopped trying to hard sell me their book when I told them I was 16. And their recruitment video had me laughing like crazy as I walked out.

I didn't know how crazy of a cult they are at the time. But it was a funny experience.