All of Sir Humphrey’s advice but I would also think about proposing a motion to the SC about inappropriate behaviour and/or a request that
a) the SC establishes acceptable protocols for its members when dealing with issues (see below) and
b) it consider issuing a Notice to Comply to the self-appointed StrataKop for unacceptable behaviour while on common property.
Now a) is worth pursuing as it would establish clear boundaries for the future and it could be something like:
In the event of a suspected by-law breach any owner or resident may:
1. Approach the alleged miscreant and politely ask them to cease.
2. Report the by-law breach to the committee, in writing.
3. Provide evidence of or witness statements related to the by-law breach.
4. Propose a motion to the committee calling for further action including mediation and/or the issuing of a Notice To Comply.
NB: When acting alone, committee members have no additional authority or responsibility beyond that which applies to ordinary lot owners or residents in the building.
Now, although b) is unlikely to fly, it sends a clear message to your StrataKop that they are in the wrong and have crossed a line as far as their general behaviour is concerned and would certainly bring their control freak tendencies out in the open for general discussion.
You might also request a personal apology from the resident concerned to your son – just to show him that adults can be idiots but it’s rarely the end of the world.
Don’t forget that the strata Act empowers owners corps to arrange their own internal mediation and this would be an appropriate forum for a personal apology.