A little more effort than Andy Townsend’s answer, but GPX files can be edited before upload. If nothing else with a simple text editor as they are just XML files. You could remove the tracks from your exploratory probing and just upload the portions that are on the trails you end up adding to OSM. If made public that would help future mappers.
I sometimes forget to turn off tracking when I am mapping trails and end up having an automobile trip to my house included. A simple edit allows me to remove the non-hiking portion of the track before uploading.