Is there a possibility of removing a RequestHandlers in runtime? Or how would you undo Core.addRequestHandler in runtime so that you can dynamically add and remove handlers? I can only think of doing this by using my custom threads, but I break out in colds sweats when I think about going that route.
I don't think it's possible, though you could write the handlers in a way you can stop them from doing anything.
Sounds like a nice feature request though!