Just say, sorry, now isn't a good time. Please put whatever it is in the post and I'll take a look. I used to be really polite, but now I am a bit more blunt and less co operative. I'm never rude, but hate the intrusion into my home and having someone else's agenda imposed upon me.
Spud I've had a lot of that lately too - must be from abroad because otherwise would be blocked by TPS. If they seriously think all those smarmy questions are in any way buttering us up then it's a big fail. Tossers!