George E. Cawthon writes:

It isn't foolish and it isn't unsafe but you need to block
the door in position. A better way might be to remove the
two lower wheels so that the panel could swing down when the
door is up or inward when the panel is vertical.

This is just contemptibly wrong, inventing advice that will not merely
fail, but will almost certainly hurt anyone stupidly credulous enough to
follow it. Good techniques may come from training, experience, scientific
analysis, or even armchair intuition, but you exhibit none of these. Let's
hope you're just being trollish.