I expect most of us have had to abandon very large editing sessions from time to time for various reasons, including getting hopelessly lost in the complexity of the data in some places.
We also would have used some copyrighted sources whilst learning the rules, but they are unable to be used without explicit permission from the copyright holders. 
Some open data sources also require explicit permission to use, depending on the licence. 
These things are of part of the process of becoming familiar with the osm.
This is a useful site to check if we have obtained permission to use...
https://wiki.openstreetmap.org/wiki/Australian_Data_Sources
I recently learned when copyrighted material has been used to add to osm, it is reverted and then redacted.
The osm Data Working Group do the redactions but anyone can revert problem edits.
I suggest contacting the Data Working Group via email at data@openstreetmap.org
https://wiki.openstreetmap.org/wiki/Data_Working_Group
with a brief explanation and a link to the changesets as the changeset comments are informative. 
They can then make a judgement and if necessary do both the revert and redaction.
If you prefer that I or @tekim does this instead, that's fine.
...and keep on mapping :)
