It's all about the phrasing (and the person you are talking to).
The way you are writing it here? Maybe some negativity, though probably still pretty positive overall. A few managers might think poorly but as a student most will be super excited to see you doing cool things.
Either way, imagine saying it like this instead:
- "I have a hobby of writing enhancements to older games. This often involves reverse engineering the game itself in order to be able to effectively make these enhancements. This requires me to do X, Y, and Z and is something I love doing! I also have a blog where I talk through an example if you are interested."
Focusing on the how you are doing this rather than the what will effectively sidestep this problem.
The reality is that if you are applying for internships and can talk about your abilities in skills you have learned doing this you probably will be successful in applying.
A lot of intern applicants haven't done anything remotely interesting other than coursework (which... isn't that interesting most of the time) so you are miles ahead of many (most?) other applicants by your hobby work.