HNZ, have you approached school about an IEP? (I remember there is back-story, I just don't recall what it was.)

The school should be evaluating your DS for social skills issues, and remediating those issues under an IEP. The intelligence of the child has no bearing on this need. These issues of social judgment get more serious if they're not addressed, especially if they can be perceived as threats to others.

IMO you should be documenting all of these incidents (in ink, with the date)-- and using them as evidence that your child needs specialized instruction in social communication.