Way back in my youth I left a band by climbing out of the toilet window and running away. I know it sounds odd, pathetic or both, but that's what happened. I'd formed the band with a guitarist "friend" and we recruited a drummer and bass player / singer (well, he was a guitarist but everyone knows that if you can play guitar you can play bass, right?) and got some songs together, played some gigs, recorded some material etc etc. It was all good fun and I really enjoyed it. Then the "friend" began touting us to labels and one or two of them showed some interest, albeit in a very initial sense. That was it - the flavour of the band changed and the "friend" and the bass player started demanding that we wrote more commercial songs and that each song we wrote had to be a potential single etc etc. It went from a fun band playing some cool alternative rock to a job playing horrid, anodyne, radio-friendly dreck, and despite my protests they were firm that this is what we were doing, and that was that. So, I ran away after climbing through the bog window, and when I left I took all my gear (not only my guitars, but the bass and amp that the singer used, the PA etc etc) and that was the end of my time in that band. They continued for about another year with a few line-up changes but didn't get anywhere. The real kicker for me was that we'd recorded an EP of four songs, three of which I'd written, and when it was released, post-bog window, the only credit I got on it was "additional studio guitars", and they'd turned my guitar parts down anyway, the buggers.
The "friend" ended up buggering off back to Canada after having stolen, embezzled, defrauded and unpaid a small fortune.