My parents had a similar idea when it came to souvineers.
For the budding photographer, buying them a cheap digital camera (or heck, a single use camera) can go a long way.
Keep the suggestions coming! Thanks.
I got PhotoPass+ during our last trip, and entered the code from the Pirate event into my account, which added about 300 pictures that I didn't want. And unless they updated recently, it is a royal pain to delete images from the PP site. It requires going through them one by one to delete, and after a few deletes the site would get confused to which picture it was on. So, it took me a few days just to delete most of those 300 images.
After I finished, I learned what I could have done is go to the PhotoPass counter in Magic Kingdom and give them the PhotoPass card from the event. They would have pulled off the photos I wanted and put them onto a new PhotoPass card, which would have saved me a lot of time & grief afterwards.
tl;dr: If you do one of the events that gives you a generic PhotoPass card, go to the PhotoPass counter to have them transfer just the pictures you want onto a new PhotoPass card.