this is actually true. I've just pushed a small change to change this now
Edit on the shared link is also a bit dangerous as there is no colab-collission detection. But there it really depends on the use-case.
I always wanted to set up a web renderer that I could quickly paste to (but was too lazy to actually do it), just to quickly show something to others.
Otherwise, maybe someone should implement this purely as a frontend to volatile.wtf
Now that I think about it, I kind of want to implement that.