Yes, we have this going on too. DS12 often makes statements or expresses opinions in a manner that others could find offensive or annoying. He has consistently stated that he doesn't know that he does this and is not aware of the negative vibe that his voice and body language give off.
Lately we've had some success with asking him to "Say that again but in a nicer fashion." He seems to get a grip and manage to control his tone when reminded.
But I see this being an uphill battle for him, especially around people who are context-sensitive. This is not an issue that we are ready to engage in just yet - DS has more pressing concerns - but it will be something we have to address soon.
