The extension of Trains on the Lakeshore Line to Aldershot seems a good move on reducing the footprint on the environment but it also hurts it. If you listen closely to the campaign Go Transit has about parking, they mention alternative means of getting to the station. A lot of people relied on the Go Bus as an alternative to get to the station if they live between stops. Removing the once an hour bus during the day ensures those people drive to the station.
Recently, Go Transit removed bus routes from York region. This forced people to drive rather than take the slower local transit. http://www.yorkregion.com/news/article/627577--go-poised-to-cancel-local-bus-routes
These are only a few examples I found with a simple google. If you have more examples, please comment on this blog so Go Transit can see the ways they can change during this earth week.