Ok ,let me explain why i allowed the situation:
Both you and him were laying tracks along the same side of the map, both were intending it for long distance hauling, so it is logical you 2 will compete for the most optimal route. In that case it happens that players cross eachothers path, or the other player is somewehre first and you have to go around/over him.
Int this case he spotted a bottleneck where you could not pass the same lake in the same spot because of oilrigs. He decided to lay his bridges there before you could.
In my opinions that is not blocking nor sabotaging, it was taking advantage of the direct route.
The fact you were planning on using that same stretch is understandable, but unfortunatly he was there first.
The fact your rails ended up touching eachother, i will not see as blocking, just happens to meet there. He rerouted his tracks while you were complaining to me.
Was it a decent action he did? knowing it would force you a different route? maybe not ,but he spotted the bottleneck and took thhe opportunity, too bad for you.
So yes, i stand behind my call not to classify it as blocking or sabotaging.