Is it safe for a child to ride in a booster seat with the seatbelt locked? I totally understand how it would be useful with a wiggler but for some reason I thought that was a no-no. Does this sound familiar to anyone else or do we still have any safety techs that can clarify?
Eta: found it. Midway through the page there's a paragraph about locking seatbelts to contain children.
http://thecarseatlady.com/strangulation/