Another vexing issue: walking behind solo women at night

Two nights in a row now...it's late at night, on a relatively sparse street, and I'm swifting walking behind a slow-moving bitch in heels. And it's happened MANY times before -- though "the bitch" sometimes wears sensible shoes, too. Often, she's very brightly yakking on a cell, oblivious to the perils around her. And very often, only at the last minute will she sense me behind her, at which point she'll whirl around panicked and I'LL feel like a thug rapist. It's VERY aggravating. Sometimes I waste my time crossing the street just to avoid instilling fear in some stranger lady. I'm all tense until I finally pass her. I CAN'T even fucking enjoy a late night walk!!!?!?!?