I could easily imagine doing that. Among my other ultra-naive moments:
* Letting a stranger come into my apartment and walk around the entire apartment inspecting it room by room in a lot of detail.
* Sleeping in the same bed with a guy multiple times and figuring since I didn't mean anything sexual then he didn't either
* Allowing two total strangers to, as an adult, walk up to me, claim to be my friends, touch me, talk about sex, and tell me they had a toy just like mine in a car. And not realize until hours later that I had been in danger.
Etc.
The problem is half that I really am that naive, and half that I spend so much energy just trying to keep up with any given situation that I have little space left in my brain to question it or to apply previous knowledge.
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"In my world it's a place of patterns and feel. In my world it's a haven for what is real. It's my world, nobody can steal it, but people like me, we live in the shadows." -Donna Williams