So much fellow-feeling here. I recently got interrupted three times in one evening - one persistent charity collector (good cause, I couldn't afford the subscription he wanted me to take out at once); one very persistent power company rep trying to get my to switch; and one unbelievably persistent man doing a lengthy survey who wanted to come in and plug in his laptop to take down my answers. After I'd already told him I live alone. Umm, no. Not even if I hadn't been infuriated by the two previous visits. I do sympathise with the lousiness of the job, but good grief.