For the most part, those charges aren't mandatory, although I think they are too easily removed by passengers as well. I think the passenger who wants them removed from their account should have a demonstrable reason for doing so, and not the typical "I prefer the personal aspect of giving the tip", which usually means they aren't going to. I think this should be a mandatory fee personally, if not outright built right into the price of the cruise.

Anyway, on the mainstream cruiselines, you aren't expected to tip over and above what the automatic charge is. Although room service generally expects a tip, and we also have tipped the staff at the kids club.