Dirty bird wanted to come over my house and try on his sisters clothes while I squirted lemon juice in his eyes. What a freak! I was busy this evening.
I'll be damn they just called again. Within 20 minutes of the first call. When they don't leave a message, I do not return the call. If I don't recognize the number I do not pick up. If it's important, they will leave a message.
As long as they're getting an answer of some sort, they're likely to continue pestering you. Shut off any answering device and let the phone ring if it's a landline they're calling on.