alt Hacker News> "it may be a little hard to understand"
Presumably they are implying that if they read creative suggestions, they open themselves to the possibility of being sued if they ever implemented anything similar to what was suggested. Doesn't sound too complicated to explain to a kid.
I always thought the catch-22 was funny where they say they saw that I was suggesting an idea ¾ of the way through the letter, so they chose to return the letter without reading it.