9 ways you can be guilty for the sins of others

“Sin is a personal act. Moreover, we have a responsibility for the sins committed by others when we cooperate in them...” (CCC 1868)
1. By counsel (to give advice, one's opinion or instructions.)
2. By command (to demand, to order, such as in the military.)
3. By consent (to give permission, to approve, to agree to.)
4. By provocation (to dare.)
5. By praise or flattery (to cheer, to applaud, to commend.)
6. By concealment (to hide the action, to cover-up.)
7. By partaking (to take part, to participate.)
8. By silence (by playing dumb, by remaining quiet.)
9. By defense of the ill done (to justify, to argue in favor.)
(Note: To participate in the sins of another person means that one is just as guilty of the sin as the one who committed the sin. For example, if you encourage someone to have an abortion, you are guilty of the sin of abortion.)