Mike
I am ASSuming that this particular misspelling is based on the fact that there actually are law enforcement officers called marshals...Maybe folks think THEY institute marshal(l) law, and 'martial law' is something done by the US armed forces.
(Personally, if I had my pick I'd disband the TSA before even the BATF. The TSA is THAT foul, IMO.)
*Not predicted on FR...But the Conspiracy Theories are the same on leftist and conservative sites, just with different names .