go dig it all up and clog up the ends of the drains of your property , or do they work that way?
Are you suggesting a "banana in the tailpipe" solution? (reference to old movie).
Personally, I think having drainage from the tile is much better than surface runoff in the long run. It is a little confusing why there are so many nutrients running out of the tile though, unless it has build up in the soil over the years and installing the tile is now rinsing it out.
What would tick me off the most is the ruined fence and the lack of asking permission. I may not be so polite to the pipe end as you are being.