Count me in.
There's something to be said about respecting dispersion and keeping tabs on how much total power is being put into the system.
I pay close attention to placement to pull off ridiculous SPL's at the listening position without causing an all out ruckus elsewhere.
If you've seen my youtube videos, my La Scalas are placed right next to one another and pointed straight at the couch to keep tight pattern control right down into the mid-bass region. Yes, there's a fair bit of comb filtering in the highs, but that's the trade-off for being able to put a very satisfactory 85dB SPL across the couch on movie night without being heard next door. They're simply not spraying sound all over the place.
I used to have a corner-loaded horn subwoofer that could literally idle at absurd levels. Because it was hardly using any power at reference levels, very little in the house vibrated.
Now that I'm back to a normal direct-radiating subwoofer, I have it situated practically right next to my head to keep SPL's up but the required power levels low.
We watched Avatar on Blu-Ray at reference levels the very first night the disc came out. I went over to the neighbors and asked if he didn't mind if we listened at shameful levels for the evening. He said he couldn't hear us. I said " , we're knocking stuff off the shelves up there right now!" He invited me in for a brief moment and sure enough, nothing....Even though the sub couldn't have been more than 10 feet away.
That and a little respect, like you said, and not a single complaint in over 5 years.