Not an actual cf tale but I thwarted the attempts of one at my cousin's wedding a while back. The event manager was being a bastard on the day, doing everything he could to spoil it. Claimed dear cousin owed him money when in fact he told her to pay last £1k afterwards in case of price adjustments etc.
Anyway the nasty man brought round 3 couples before the ceremony & one afterwards to view the room. He told the last couple that all the decorations that we paid for would be there for their wedding next day. I overheard him telling waiting staff not to come in until 10am as they would reuse everything from my cousin's wedding.
At the end of the night, me and some guests stripped back the room, all dirty table linen in a neat pile. Tables & chairs stacked up on the side. We took home all our decorations that cost over £2k which the shite promised the other couple for free everything cleaned so the shite couldn't complain that we trashed the room.
I would have loved to have seen the shite's face at 10am the next day expecting the room to be ready. There was an hour to get the room ready before the next wedding at 11am! He also told his staff not to come in until 10am. Karma and all that.