All Discover is is a graphical front end to your repositories, so the real question is “is everything in my repositories safe?”.
There are no guarantees in life, but if you’re using only the default official Debian repos you’re just about as safe as you can get. If you add extra repos, whether deb based or flatpak, Discover will only be as safe as whatever you’ve hooked it up to.
If only the biggest problem was messages starting “I asked ChatGPT and this is what it said:”
A far bigger problem is people using AI to draft text and then posting it as their own. On social media like this, I can’t count the number of comments I’ve encountered midway through an otherwise normal discussion thread, and only clocked 2 paragraphs in that I’m reading a chat bot’s response. I feel like I’ve had time and braincells stolen from me in the deception for the moments spent reading and attempting to derive meaning from it.
And just this week I received an application from someone wanting work in my office which was very clearly AI generated. Obviously that person will not be offered any work. If you can’t be bothered to write your own “why I want to work here” cover letter, then I can’t be bothered to work with you.
All translation services use AI, and have done for decades. There’s pretty much no other way to do it.