FACTS then as i aint had a license for 4 years.
I just cancelled mine with no reason what so ever, legally you don't have to tell them shit.
Its not illegal to have a TV to watch streaming movies from any source. Games consoles etc....
If you have a TV and it has an aerial plugged in and you get caught with the tv then its illegal.....
If the ariel is not plugged in then its 100% legal.
Simple init...
They come round about 3-4 times at the start of you cancelling it then never bother again.....
They call you in 3 years after that and ask you to confirm your arrangements haven't changed.
As for TV vans

Total Myth there is no such thing.