Unfortunately there are very real problems of sexual abuse in out communities. Thankfully, we have someone who works on behalf of the victims and tries to stop abuse before it starts. Instead of putting pictures of those "gedolim" who protect and enable pedophiles in your sukkah, put up this picture of Harav Chayim Soloveichik. He is an outspoken voice in defense of our children, and putting this picture up in your sukkah will hopefully raise awareness of this important issue and show pedophiles that they are not welcome.
If you bring your children to open, public events during the Chag, such as a Simchas Beis Hasho'eivah, please keep an eye out on your kids. An open, community-wide event is an opportunity for innaproproate activity by these people.