Well, I did say same level of technology, but some a century ahead or at least ahead some areas might be aware of and appreciate what a beautiful planet this is and be concerned if they detected nuclear explosions and knew what they were. Our own Terrestrial Planet Finder was developed but not funded for deployment. But an alien civilization that had some awareness of Earth might have had the incentive to spend more on examining exoplanets. At least there might be a lot of buzz about it.
If they had the means to send probes to orbit the Earth, perhaps they would be streaming radio and TV broadcasts back home, creating a whole new fanbase for our music, etc. and even Star Trek (somewhat as envisioned in Galaxy Quest).