Private Austrian photographing all cars from behind (inside)

Hello forum, last Saturday we drove the Lechtal in Austria from the south to the north. There was a tragic accident.http://www.tt.com/…/…hwerverversichert-bei-motorradverfall-in-elmen.csp We were then made aware by a helper of a redirection to the other side of the Lech. There were a lot of cars and motorcycles turned around and drove the following redirection:https://www.google.de/…/data=!4m2!4m1!3e0 So all people drove along the Klimm (a bike path) around then to return to Martinau on normal roads. As I said from south to north. And then, like many others, I drove through Martinau from south to north. There, on the left, a small group of locals stood on a private property in front of a barn. A gentleman had a system camera with a strong zoom in his hand and on his eye. He photographed every single vehicle from behind after it had passed the property of this gentleman. The place of the house as well as the place (about 30m further) where the photo was taken were already no longer a cycle path but quite normal inner city streets. I guess he would like to use these photos to report this to the police and to provide for a “fair punishment”. If he is not allowed to use the photos legally, he still has the possibility to bring the number plates from the photos on paper, so write them off, and then use the “exterior witnesses” to show the vehicle owners . 1. Has he violated my personal right according to Austrian law? 2. Can a private person take mass photos of vehicles in Ö? 3. Does EU law apply in Ö? 4. If the Austrian police actually accept the photos, how expensive is that then? 5. How much effort will it be for the gentleman to display the 100 drivers? 6. Are there mass advertisements in Austria? (I don’t believe, but you never know) Gruss W.