Just when you think you've heard all the possible wedding dramas, I ran across this one on Wedding Bee. I can only say: "Wow"
http://boards.weddingbee.com/topic/maditory-gift-for-bach-party-uninvited-from-wedding-ask-for-wedding-gift-back?replies=145
This poor lady was invited to a wedding. The MOH threw a bachelorette, invited this lady and told her she HAD to buy a particular expensive gift or she could not attend the bachelorette. When she did not buy the gift (and did not attend the party), the bride uninvited her from the wedding and demanded she return the wedding invitation. When the lady did not immediately respond to the demand by trotting over to turn in the invitation, the bride's mother called this lady's mother and said they'd call the police if she didn't return the invitation! They also have this lady's wedding gift that she sent, and have made no offers or effort to return it.
I'm not the strictest person on etiquette, but I am pretty sure that the bride, the MOH, and her mother have violated at least a few of the finer points...
Crazy!!!