I was referring to locks done after throws (assuming you can do a Judo throw on your opponent). There are a number of locks which can be setup while your opponent is in the air which can be applied when they land. If you don't manage to get the lock on, sure they can escape but once the lock is on, it's significantly more difficult.
This one here seems ok to me as an example:http://www.mahunter.com/ujj/techniques/traditional/yellow/hip_throw_shoulder/index.html
Doubt they could be done effectively against someone not wearing long sleeves, but in this country that's not a problem.