I hope you have good measures to stop spam and to stop people abusing your run features. Or even just to stop things like infinite loops in this code sample (if the syntax error is fixed) https://harigami.net/cd?hsh=0b7c2f43-bf85-4efe-bedb-f6b60c8f... (I didn't submit that sample btw)
Thank you for good comment. As you say, I have to think measures to stop spam (Now I delete spam manually). For escaping infinite loops, I'm considering to add time out.