Is it actually dangerous to use read for user input? (defun read-data () (let ((data (let ((*read-eval* 'nil)) (read)))) (mapcar (la

Is it actually dangerous to use read for user input? (defun read-data () (let ((data (let ((*read-eval* 'nil)) (read)))) (mapcar (lambda (x) (format 't "~a: ~a~%" (car x) (cdr x))) data))) Then I can (read-data) (("a" . 1) ("b" . 2) ("c" . (funcall (lambda () (princ "I ran code!"))))) And the following will print. a: 1 b: 2 c: (FUNCALL (LAMBDA () (PRINC I ran code!))) But of course unless I eval the code, arbitrary code will not run (assuming I haven't forgotten some aspect of the reader).