No, as a matter of fact I am not.
All can help both sides.
Avenge triples the ability, making Confuse 90% which is why I failed so much last time you cast voodoo on me. So if you are online when the raid will be conducted you can stop us from casting; Very easily if me say so myself.
Undercover I do agree, it helps pirates more - Maybe less of a range for fame undercover?
However piercing can help all players, if one is locked in a mind-bar or has to break the mind-bar ( On a pirate or merchant ), otherwise if one was locked away with a mind bar and 3 foj on them - They would be lit for 12 hours straight... Without any hope from outsiders.
Coin Flip can help both sides as well.
Not personal - Stating facts.