I was reading an article in the Winnipeg Free Press about police and photography. The article talks about police seizing the videotape of a documentary filmmaker recording the destruction of a house. It is clear from the article that the police overstepped their bounds.
It reminded me of the various run-ins that railfans have had with police and railway police in particular. In some cases, (idiot) railfans have made a nuisance of themselves and deserved the attention. However, in many cases (such as this) railfans have been harassed for no good reason.
Know your rights. And follow the railfan etiquette.