Definitely report it, I honestly wouldn't feel comfortable with someone else moving my Aircraft without my knowledge or being directly associated with the Aircraft in some way, you have no idea what they've done during the move. It's unlikely that they damaged anything but there's always that possibility and they may not even know it. Not to mention the stupidity of touching someone else's Aircraft without knowing the condition and any potential issues it has.
Have no idea why anyone here is defending them at all under the idea that no one got hurt so it's all good, that leads to the idea of just letting them do it until one day someone does get hurt and THEN doing something about it. This is not the industry for that kind of mindset.