I don't like being ambushed by a FC Join request or a Friend Request. I will automatically decline them.

If you want me to join your FC, then have the courtesy of TALKING to me first. I am willing to DISCUSS the merits of joining your guild.

But, if you want my help with a dungeon, that's different. I like to help players. I can be TALKED into lending a hand. (It's not that hard.)