I think as a professional wedding videographer, you had an obligation to make sure those sort of things end up on the cutting room floor, so to speak. You had no obligation to record every bit of obnoxious behavior. Especially if you were getting paid, you want to deliver a product the happy couple could watch without cringing.
And yes, such stuff is pretty near universal. Even if it doesn't rise to the level of a drunken ex-flame rising to plead their case when the minister asks if there are any objections. At my wedding, somebody stole my wallet out of the dressing room! That was not in the videotapes.