My crew and i (my MA mates, that is) call this "The Wazzah Factor" - when people discover your into the arts, they invariably say "WAAZAAAH!!!" (ie, bruce lee cat noise imitation), or the "Remind me not to pi$$ you off!" comment, or one of the many things described above.
For years i refrained from telling people i study the arts, but its hard to strain it out of ur conversation when it forms such a big part of ur life - as all of u know, i'm sure. So now, when i make mention of going to train, or something similar, and people ask what, i say "I'm a boxer...sort of." Boxing, being familiar to most, has a very low W.Q. (Wazzah Quotient).
{NOTE: Any martial art's Wazzah Quotient can be determined by dividing the number of times it is mentioned in normal conversation by the number of times the "WAZZAHH!" response is returned.
Ninjutsu has the highest WQ, and oddly enough, seemingly due to public ignorance, Taiji has the lowest WQ of all}.
Everyone gets it. It is seemingly unavoidable. Perhaps the only release is to press for a "Wazzah Factor" forum here, so we can share our Wazzah related frustrations and rejoice when some special one among us triumphs over the tyranny of the innocently ignorant.
Cheers
Bao