When I was 18 I lived by myself...in my parents house, they were too busy with my stupid brother, who was locked up in Juvenile detention since he was 12...
I did hang out with a lot of bad people but I never did anything that they did...
My parents weren't around but I still had the grey matter between my ears to figure out the difference between acceptable and un-acceptable behaviour.
The 18 year old was probably the peer of the group, the younger ones followed the lead...
"When I was 18 I lived by myself...in my parents house, they were too busy with my stupid brother, who was locked up in Juvenile detention since he was 12... "
When I was a teenager I gave my parents so much grief they probably wished that I lived by myself in ANOTHER house. When two Protestant parents consider sending their son to a strict Catholic high school to straighten him out, you know they're desperate! The threat of that caused me to mature overnight.
I hope your brother eventually straightened out.