I'll not comment beyond I got my licence at Dundee and although I'm not a frequent visitor I know the area pretty well - little of what I have read makes any sense.
The Tay rail bridge is approximately 1300m from the airfield boundary, about 1550m from the threshold - it is about 40ft high at the north end.
The two jackup drilling rigs are approximately 5.5km from the airfield on the north bank of the Tay, they are approximately 200ft high. The nearest the 'tree' can be is 4.5km to the threshold but north east of the runway and the far side of the city and Law top (height 570ft) to the airfield. From there it is difficult to see the airfield.
Robert Frost comes to mind "Half the world is composed of people who have something to say and can't and the other half who have nothing to say and keep on saying it”