Reminds me of episode here last week.
Daughter: Dad, we saw you ordered Viagra on the internet!
Me: eh? Oh we get e-mails about that all the time
Missus: Yes John, but Tina saw your little notes on a post-it
Me: eh? (need to sound convincing) yes I make lists of sex words for the anti-spam program.
Daughter: yeah right!
I then had to convince them by showing them an E-mail Routeing screen on the PC with every conceivable sex word and spelling-variant on it, the program rejects mail with any of those words in the subject header. That shocked them
We found the post-it, it had scribbled on it the words pills, sexual, viagra and variants vi4gra and viagr4
My spam-basher rejects about 20 mails a day. It includes words like Halifax and Barclays because we have no accounts with them.