When wiring speakers is it bad to use thicker wires out of a stereo, then using thin wire to reach the speaker?

I'm totally lost as to why you would have to rewire a living room just to accommodate speakers, on my setup the speaker wire goes from the speaker directly into my audio component(s). At any rate, all the hoopla about speaker wire thickness is a bunch of hooey in my opinion. This will probably draw fire from Monster Cable fanboys but there really isn't much measurable sound difference between thin speaker wire and thick. It's just marketing designed to stroke people's elitist audiophile egos. If you have a really high-end system say, McIntosh or Bang & Olufsen, it might matter and in which case you probably would not have to ask.