I can confirm that some players on my server are also having this issue. However, someone fixed it by installing an older MTA version and then installing a new one over it. Dunno if it actually works, but you can give it a try.
First of all you have to use 'resourceRoot' instead of 'getRootElement()' in 'onResourceStart' event.
Second, what server version you have? There were some fixes for broken removeWorldModel in the 4785th nightly build, may be you should try to update your server and try to run your script again.
If nothing helps, try to do your script on client-side.
На сервер по бОльшему счету - никак, в основном на клиент. Разве что у некоторых игроков может вырасти пинг, если вы собираетесь проигрывать звук потоком (со ссылки внешнего источника).