About truant officers: One day, walking along the sidewalk at 10:00 a.m. or so, I saw a truant officer walking along the sidewalk, too, in the opposite direction. He spotted a different teenager, also walking along, and arrested him. I think the truant officers ignored me for two reasons: because I didn't look like a truant, and because I lived near a college campus. I didn't have a computer of my own, so I went to the college campus and wrote code there every day. I probably looked like a "precocious" college student (I was 15, and probably appeared 13).
BTW, I never saw any difficulty later in life due to dropping out of high school. I've never seen anyone look at anyone's grades on a résumé or job application, never had anyone give a damn about my lack of credentials.
And now I'm a Ph.D. student.