Notes

7. By partaking (“I'll give you a hand stealing it.”) This one is also a no-brainer. Yes… if you are conspiring in a sin, you are the sinner. This also means buying fenced goods from a disreputable source. If someone is selling you top-of-the-line products at low! low! low! bargain basement prices, chances are it's not because of a fire sale but rather a felonious act.
7. By partaking
This one explains itself, no?
Finally, be strong in the Lord and in the strength of His might. Put on the full armor of God, so that you will be able to stand firm against the schemes of the devil. For our struggle is not against flesh and blood, but against the rulers, against the powers, against the world forces of this darkness, against the spiritual forces of wickedness in the heavenly places (Ephesians 6:10-13).

https://catholic-link.org/9-ways-not-to-participate-in-anothers-sin/
https://www.ncregister.com/blog/9-ways-you-might-be-sharing-in-the-sins-of-others

2480 Every word or attitude is forbidden which by flattery, adulation, or complaisance encourages and confirms another in malicious acts and perverse conduct. Adulation is a grave fault if it makes one an accomplice in another's vices or grave sins. Neither the desire to be of service nor friendship justifies duplicitous speech. Adulation is a venial sin when it only seeks to be agreeable, to avoid evil, to meet a need, or to obtain legitimate advantages.