I really can't believe some of you are defending yourselves for not providing a taxi - or at minimum just checking that your sitter has one before they leave.
Not sure about sitters, but I'm pretty sure that other sitting services expect you to provide a taxi after 10.30 (if they don't have their own transport).
Seriously. I guess babysitters just need to be a bit more picky about who they're willing to babysit for.
Agree re. food too - it's just about thinking about those who are doing the important job of looking after your kids for you.