We have friends who have number withheld, or if they phone me up from work it comes up the same, so we cannot ignore them. I think we are lucky compared to the number of calls some of you get, since on TPS it is very rare.
Occasionally get chance to bring out my crazy alter ego and ramble on for a while, but usually I'm so irritated at having to run up the garden to answer the phone that I am a bit snappy.
They should never subject someone to swearing like LuckyCharlie has had to put up with :(