I can't say I agree with that. Actually I think that an easily-accessible code interpreter sitting inside a browser, with a language and runtime capable of delivering spectacular stuff in just a few lines can nurture a future generation of programmers, not unlike the generation raised on easily accessible basic interpreters on various 8-bit computers in the 70s and 80s. I don't think denying access for beginners to powerful but harmless tools (it sits inside a browser) is a good idea, how could they become experienced professionals such as you then?
get used to "kill -9", you're going to be using it to preempt all this amateur-hour worker code people slap together and foist on you