Most departments have polices regarding the association with known criminals. So if you like posing and grinning with a local outlaw motorcycle gang (OMG) member, wake up and smell the coffee. I understand there are many officers who are recreational motorcycle riders. However, if your local event becomes a hangout for three patch OMGs, it is time to leave. Additionally, if you have a family member that is a street gang member notify your supervisor. Most departments may not allow your frequent association.
There are some events you just need to leave alone. I don't care if they are raising money for whatever charity, if a back splash on your reputation can happen, it will. Many criminal enterprises make donations and appearances to freshen up their images; don't be a part of this trap.
Smile for the Facebook
Here is a reality check. We live in very photo-savvy times; there are mobile phones with cameras, citizens taking action photos for local news, street surveillance cameras, and on-board car cameras. So act as if you are always being filmed, on and off-duty.
Social media is the latest front on which officers are getting hung up. Set your privacy settings high. Be extremely careful whom you befriend, and watch the photos you post. Your pals may see them as fine, but one person can and will bring it out to haunt you later. Reconsider all chats, postings, and photos and be ready to defend them.