LEM, circumstances like you describe are not too uncommon. It is unlikely that all operators to such an airport would brief ATC on their s/e procedure. One day there will be a mid-air & the !!!! will hit the fan world-wide, as airlines & ATC try to profess their ignorance of the risk and blame it on the crews. Its not so serious at a purely domestic airport with just a couple of good airline operators. Make it international with lots of airlines, throw in a few african freighters, fatigue, weather, english as a 3rd language, cultural difficulties etc and the risk is higher. There are a lot of controllers, pilots and aviation authorities with their heads in the sand.