The definition of "behaved" in use in those articles has to do with drug use and unprotected sex. You don't do drugs and have unprotected sex if you stay home

The definition of "behaved" in use in those articles has to do with drug use and unprotected sex. You don't do drugs and have unprotected sex if you stay home all day. The lack of opportunity to misbehave doesn't make you more "behaved".