Normally, the same foresight that inspires one to carry a firearm or any weapon for personal protection would have those folks avoiding this area to start with. I would not be surprised if there were armed people in the vicinity, but concealed.
This whole canard is, as canards usually are, overblown.
What this sort of statement reflects more than anything is a lack of trust -- in the police with the people at large, which is understandable to a degree, and in the anti-gunners themselves, who don't trust anyone... not the 'common man', not the police -- not even themselves.
does your dad know you're using his account???