My wedding didn't really have any bad guests. At most, some people got really drunk towards the end of the celebrations, but that was at the after party down at the beach at Cafe Mambo Sentosa and we totally anticipated it.
The ceremony and lunch at the Moevenpic Heritage Hotel on Sentosa was great and I didn't sweat the little things... like wrong music playing, the waiters asking my guests if they wanted chicken or fish when I already specifically fixed it as ALL fish, except the muslim table (and there was only one muslim table) so when other guests started saying, oh there's fish, ok I'll have fish... there wasn't enough fish to go around!
Also, I had one whole table almost empty (only 3 of my friends sitting).... because a whole bunch of David's guests didn't turn up. I really should be mad at him, because I spent so much time planning all this and sending the invites out. All I asked him to do was call and check on his friends who didn't RSVP. I did that for my side of the guest list, I even messaged and reminded my friends about it in the days leading up to the wedding because I'm obsessive like that. But for his friends, he just said, "They'll be there." -_- hmph.
So yeah the worse kind of people to invite to your wedding are the kind of people who just don't turn up last minute... very bad.... don't they know the cost of each seat at a wedding banquet? Or the time that was put in to the sitting arrangements? Don't they care that their action says... meh... I changed my mind about going last minute because I woke up feeling lazy?
I surprised myself by not freaking out that day, but I guess you don't really have the time to freak out on your wedding day, everything just goes so fast!