Facebook warning when posting a link of the form

When I copy paste the link of my survey onto a facebook post or message, I get a warning message that the link may be unsafe. Then I have to select pictures of lions & waterfalls. I am worried that the same may happen when people click on the link or try to share it on their wall again. 

Is there any way to avoid this from happening?

I used your last form ID and post it to my wall and send it to a friend and I'm not getting any warning messages. Here's a screenshot:

This form: http://www.jotform.me/form/53534457532457 (non secure) or this https://www.jotform.me/form/53534457532457 (secure).

You should use the link of the form and avoid using URL shorteners.