How significant would my ISS be to colleges?

Basically, I am a sophomore who received an ISS for privacy related issues. I am extremely competitive and our school uses a computer service to store all of our GPA’s (separate from actual class grades). The login information for the service was extremely simple, everyone had the exact same password and the user ID was your ID number at our school. Additionally, the ID numbers of students are posted around the school pretty conspicuously. Eventually, I realized I could obtain these ID numbers and log in to find out other students’ GPA’s. This involved taking pictures of ID postings and just knowing the ID’s of some of my close friends. However, I did not realize the extent of the action I was committing. The service our school uses also includes home addresses; parents’ phone numbers, emails, and names; and DOB of the student in a separate part of the service. I had no intent to ever look at or access this part of the student’s information and never did, and I never recorded/memorized any of the GPA’s I looked up. My schools was VERY generous to me in giving me a 3-day in-school suspension, as this could have been reported as something like a federal crime. They also said that this would not go on my record because they know the type of student that I am (I am a hardworking student with a very high GPA that is involved in many clubs.) I deeply regret my decision and nothing similar will ever happen again. That being said, how heavily do you think this would weight on college admissions if information regarding the situation was requested? Additionally, if the application just asks for an in-school suspension do you believe that it would be better to not describe my situation in an area such as “Additional information”.