This happened to us almost as soon as we moved into the area (back in May)....the guy (young, white, blond, boyband-ish looking, bit spivvy, no uniform or ID) virtually stepped over the threshold before we could do or say anything, went into his patter, whereupon my husband quickly blocked the door and ushered him back outside onto the doorstep.

He then asked why we weren't interested, and my first and only remark to him was:

'Because it's SATURDAY NIGHT, dude!'

It would never even have occured to us to get into any sort of detailed or info-offering conversation with him.....and I strongly advise anybody to *never* do this!

Cold-calling is just obnoxious, 'legitimate' or otherwise!