You're doing your public duty to report something like the photo taking .. no matter how innocent it may seem, if it strikes you as odd and is synch with our known enemies, just do it .. you never know what you may be preventing. Our crime fighters just can't be everywhere all the time.
The street here is called 'Capitol Street' and is very historic. At what point does one become labeled as a 'nut case' for reporting all the photographers? Theoretically, I understand what you are saying, but how do I distinguish? And when does the FBI write off the calls as someone overly paranoid?
By the way, not to 'profile' as that is politically incorrect, but some have Mid East or Oriental characteristics; some do not. Some look 'furtive' and some do not.
The point being, do we overwhelm the FBI with all of our reporting, or can they handle all of the calls?