OK, Silas, you're on!
"Incandescent light bulbs give off more heat than light and because of this they help heat my house in the winter. I don't want to switch to CFLs or LEDs because my heating bills will increase. "
Technically correct, of course, but, under the vast majority of cases, not savings anyone would ever notice :-)
How about this chestnut: "Heat rises" (Arghhh)
As we all know, hot air rises because of convection. Heat, on the other hand, moves from a high temperature to a lower one. I believe that's why the universe is ultimately doomed to a frigid demise...something about enthalpy.
And another: "Operating a direct vent gas fireplace offsets my heating cost by only warming the area I am occupying".. (See my Forum entry for a discussion of this issue :-). Which reminds me, anyone else steaming about the magic electric heater from those friendly Amish folks that will provide 1.5kW of electric heat for the bargain price of only $300. I could turn on my $20 toaster and get the same effect, or go to the local "Big Box" and get a proper electric heater.
One of my favorites: "A PSC fan motor trying to move air against a clogged filter has to work harder to maintain air flow." This would be technically correct, if the motor could work harder, but since it can't, the different, strained sound it starts to make (vaguely similar to a vacuum cleaner with a blocked hose) is because it's spinning faster against reduced air flow load.
"Clean Coal" ??
OK, I'll stop now.
Technically you are correct that hydronic baseboards are not the problem. Specifically, the fact that your boiler has to distribute hot water at about 180 degrees to drive them is less efficient than say a radiant slab that requires water at a far lower temp. that allows greater system efficiency since there is a larger delta T at the heat exchanger.
Sounds like you are a wethead with high level understanding of hydronic efficiency WRT to supply and return temperatures.
Maybe you can explain to folks how to squeeze the greatest efficiency out of a modulating condensing appliance?
Maybe you can also explain to the folk that think that aggressively adjusting thermostats back may NOT save the money they think, and that suggesting it as prescriptive measure for "saving energy" is building science malpractice?
A HOUSE IS A SYSTEM OF SYSTEMS. DO NOT RECOMMEND SETBACK WITHOUT UNDERSTANDING THE SYSTEMS. TO DO SO IS A SIGN OF IGNORANCE, INCOMPETENCE, AND IT MAY DRIVE PEOPLES ENERGY CONSUMPTION UP AND COMFORT DOWN.
And don't assume savings without measuring.