Years ago I sent a message to a stranger. I received an auto-reply saying "I got your mail, spam is hard, click this link to deliver it and prove you're human".

For a second I thought it was a cute solution to spam, then I realized we'd be in a world of pain if we mailed each other, and both of us replied in such a fashion.

I never mailed him again.

If I have to do work to contact somebody? Well I'll just ignore that person. Sorry.