This is all reminding me about my sister who completed an online form for scientologists (long time ago).
They contacted her and oh-so-nicely invited her for a no-obligation chat. My theory is that the way she completed the form probably singled her out as "gullible and easily intimidated".
They frog marched her to her cashpoint so she could get the money to pay for one of their "courses". She freaked and ran away. They then stalked her for months, hassling her, ringing at all hours of the day and night, making intimidating threats.
She changed her telephone number, and thanked her lucky stars she never gave out her address.