What is the reason that guildmates show up on the Skirmish page without an attack option, yet they show up on the Plunder page with the option to Assault/Instant? Obviously the attack will not go through due to their status as guildmates but it seems weird to have one set of options hidden and not the other.
Plunder Page:

Prompted message after attempting to attack guildmate:

Skirmish Page:

PM me any complaints (10M gold coin wire fee is mandatory).