All they have learned from my personal information is that I am a cheap SOB not worth selling anything to ;P
Im the same way, dont do any on-line banking or paying bills except thru pay-pal and so far I have not had any issues but Im sure even paypal will eventually be hacked.
I was needing a defrost timer the other day, went on E-bay, Amazon ect, found one and bought it but now all Im seeing to the right of mt screen are defrost timer advertisements.