how do you protect a form from being accidentally deleted?

Hi,

Any deleted form can be restored from the trash:

http://www.jotform.com/help/134-How-to-restore-deleted-forms

If it is accidentally deleted, you would also need to purge it from the trash in order for it to be fully deleted.  This is our safeguard against accidental deletion.

If you have any further questions, let us know and we will be happy to help.