I am interested in participating, but I see no mention of what a gifter should do if they are presented with themes or ships they are uncomfortable with. Is there a way to handle this?
When the sign up sheet is posted, you'll see that you get to list your preferences (ships, themes such as fluff and angst, nsfw or not, spoilers or not, etc.) for what you DO want to make and receive, as well as what you DON'T want to receive or make.
we mods, when the match-up process comes around, will pair everyone up accordingly, making sure the gifter you receive has a preference in common, as well as make sure the person you're gifting to has a preference in common.
we also double check the match-ups to make sure nothing clashes.
in the event that we mistakenly miss a bad match, all one needs to do is send us a message (as soon as possible preferably) and we'll rematch them.