I feel your pain. I drive my M3 everyday to work. I am in a position and industry that frowns upon it. "If you drive an M3 then we must be paying you too much" mentality.
I didn't care. I am 44 and have worked my a$$ off to afford one. I tried to be casual and not even mention it. When first asked I just told everyone "yeah I got a new car". "It's just a 3 series". Then a few car folks knew what it was so I took a ton of grief for the first week or so. They are over it now and life moves on.
I absolutely feel your pain but the pain will go away.
2013 AW/BLK - DCT, Comp/Cold/Prem
Mods - IND Beauty kit, CF Roundels, CF Splitters, AiB Angel Eyes, EAS Exhaust Tips! B&G lowering springs