Railfans are not dangerous, they’re helpful!
There are people and organizations that think railfanning and taking pictures of trains is inherently suspicious and poses a security risk. By chance, I ran across the following statement on the website of British rail network operator Network Rail today - I think the British got it right there - there’s no reason to be scared of railfans:
Your (the Railway Enthusiasts - ed.) presence at a station can be very helpful to us as extra “eyes and ears” and can have a positive security benefit.
Quoted from Network Rail - Railway Enthusiasts

