Windows Phone has a nifty little feature to block calls. I will be adding this number so he can't call again.. same thing I do with all solicitors. Not sure if other phone OS's can block specific numbers.
Runnng eSet Mobile Security on Razr Maxx. Have Call/SMS filter rule set to block all calls from 360-797-####. Have some other rules set to filter other 360 area spoofed numbers. P.I.A. Never answer unless I see a name or number I recognize. If you do answer, they have you as a valid number and sell it. If I use *67+number to return call w/out my ID showing, get either constant busy signal or "not a valid number" phone company response.