I know, I was really happy when they came in the patch but they get a memory for every little thing! One for visiting the park, one for each date, one for each whoohoo, one for each tour, one for each promotion, one for each time you level up on a skill! First time you do something and when you complete or max somthing would be enough. At least you can delete them. I'm going to clean out the scrapbook of non-custom memories at the end of each sim week.