I think the hate on recursion is too strong. For one thing, some languages have tail call optimization, which can turn recursion into a loop without using up th

I think the hate on recursion is too strong. For one thing, some languages have tail call optimization, which can turn recursion into a loop without using up the stack. For another, recursion can be bounded, so that if a malicious document tries to use a lot of recursion, it just results in an error reporting the recursion was too deep.