"Sorry my Dad isnt in"
They just look confused at me
LMAO, I used to do this in the high street where those MF's try and stop you and get you to signup to X,Y,Z.
Just walk past and as soon as they engage you say "Sorry, I'm only 15" and keep walking. (Usually gotta be 16 or 18+ to signup).
Funniest thing was, I was doing it well in my early 20's
The OP is different as they are catching you out in your own home where you are most relaxed and comfortable.
Two things:
1) Get one of those signs that says "No cold callers or salesmen" and stick it on your door. If they come knocking ignore it or open the door and just point to the sign. Then if he keeps talking tell him "Don't make me point to the sign again".
2) Just open the door, smile politely and say "Sorry, not interested"
I had this happen a few weeks ago, after living in a flat for many years and now living in my own house I was a bit like "Wtf is that at my door at 7:30pm?"
Opened up and there was some black guy stood there bouncing around to keep warm. He opened up with "Brrr, chilly out here, sorry about my crazy bobble hat it's really cold out here (hint hint). Hmmm that smells nice..."
At which point I said "Yeah mate, that's my dinner and I'm about to sit down and eat, not really a good time". He just smiled and said "Ok no problem" and walked off.
Just be polite. Can't go wrong.