Unless required by legislation, there is no way a company is installing a control panel with a padlock on the door in any plant I'm in charge of... unless of course they pay us for loss of production and carry out maintenance for free.
I'm actually quite shocked that the protection solution for Rockwell is the switch in the front panel... which I'm sure is the same for every processor and therefore not a security at all. Simply a deterrent with the price tag of the cheapest processor.
Cardosocea you are right, but I said that because I'm in charge about my PLCs and no body cant touch them without my concern, because the stability of the plant could became unstable if a lot off people access to the program of the PLC to make changes, of course everything could be different if I have a contract of service with someone else to do that