Hi welcome to OSM. In many of the change sets you have been making it you are removing features that appear to exist on the ground in vary recent aerial imagery. Could you explain why these features have been removed? 

Also note that the description box on a OSM changeset is to let others know the reason you are making changes and where you are getting your information, your experience great, but its that's helpful for others trying to understand why you are mass deleting was seem to be valid trails. 

OSM is a community effort, please explain your self and your source before you continue to removed data.