Umm, I'd be careful to get too crazy. Do the agents realize that most federal employees had active shooter courses, information, or activities? I expect DHS was not exempt from training of this sort too but it doesn't necessarily apply for them specifically any more then it would for the MP's guarding the gates of an installation who probably had to take it too.
The key word for the agents should have been the 'mandatory training' which they should be used to taking every single year for everything from structure of their organization to the handling of information. Many modules are not necessarily practical for every persons' job, but they all must be taken--yearly. Just a thought. I think these guys are pissed from the ruling that came down recently and I don't blame them, but I wouldn't take this, considering it's one of those 'fun' mandatory training all employees have to take, to use as fuel. It should be common sense enough that the ruling is outrageous. Don't take mandatory, desk pusher training and make that as a platform because they know as well as anyone else there are lots of modules everyone has to take (unfortunately).