They are so persistent too. I have this conversation a few times a year.
Guy: we can spray and kill all the bugs in your yard
Me: no thanks, the bugs are there so the birds have something to eat.
Guy: we use an organic compound that won't hurt the birds.
Me: NO
Guy: do you have spiders in the house?
Me: yes there are a few.
Guy: We can spray...
Me: no, the spiders are there to catch the flies and centipedes that make it inside. I don't need your help because everything functions like it should.
Guy: confused look on his face
I'm so happy that I'm not the only one who leaves spiders (mostly) alone in the house. I had a neighbor once who was like, "Uhh... there's a big 'ol spider in your bathroom." One of my children then goes, "That's Henrietta. She lives behind the toilet and eats bugs." The neighbor looked at us like we were crazy. Henrietta's offspring have been living quietly in my downstairs bathroom eating ants for about 20 years now.
My wife has to handle those guys for me now. They blatantly lie about their product and I got nasty with one when I started calling them on their bullshit. Fuckers are destroying the planet to make a very small amount of money.