Up-selling idiots

My eleven year old Ford truck got recalled along with a lot of Fords. The issue is that a cruise control valve can leak some brake fluid and with a spark, have a fire. Ford solution is a fuse-link, which will trip/burn/blow if the short happens. You'd loose your cruise control, but not burn up the car/truck. So I called a local dealer, check the parts are in and they can fix it. They were just great to deal with. I dropped off the truck and they gave me a ride home. A few hours later, they called with the "up sale". What a load. They think we are all idiots. In their attempt to sell me something, they showed that they are the idiots.
My truck has a K&N air filter on it. These are a cotton fabric in a mesh. You CLEAN them about once a year. You spray on their cleaner, wait a bit, gently brush off the gunk, repeat if needed. Once clean, you rinse with some warm water and set it in the sun for a time to dry. You then apply some of their oil to the cotton and put it back in. I even have a big STOP sticker on the air cleaner housing, which states that it is a cleanable filter.
Ford thought it was dirty and needed REPLACED.
Um, now, they always LOOK a bit dirty, when they are doing their job and catching dirt in the reddish oil.
I guess they couldn't read the big sticker saying DO NOT THROW AWAY.
So they then decided to tell me how the connectors for the Air to Air inter cooler (my truck is a turbo diesel, after the intake air is compressed, which heats it, they pass it through a radiator to cool it) were oily and needed replaced. I just said "NO". Seems they didn't think: 1) 1999 (but 11 years old), truck. 2) Diesel 3) Oil leaks after 175000 miles. 4) the Connectors are not the CAUSE of the oil, especially when all that is passing through them is AIR.
They think all customers must be idiots.