After turning 18, my folks only let me stay with them twice. Once was when I had had serum hepatitis and was recovering. My liver function was down around 40% and I had seriously yellow skin and eyes from the jaundice. That lasted about 2 months. The other time they let me stay with them was when my mom said if you attend the local community college full time, you can stay with us. Turned out I wasn't applying myself seriously enough and they turned their poor boy out again. Shit, I got an A, a B and a C in the academic classes as well as an A in Gymnastics. Fuck. I'm an HSDO (High School Drop Out). I got thrown out of the entire Los Angeles School District (122 high schools at the time) in my senior year, 1968. I've always wondered if perhaps my folks felt some slight shred of guilt or remorse about having taken me, their beamish boy (along with my 3 1/2 joints of very shitty weed), straight down to the cop shop (that would be the LAPD) and saying "He's fucking out of control. Do something with him."
In my perhaps not particularly humble opinion and all things being equal, I believe kids, really young adults, should have to at least participate in their own damn upkeep. For me, it was a good thing to be forced to meet reality. Where's my bong...