My first question is: Is it true that if your opponents obtains more than 5 back field cards (traps, etc) that they automatically lose? I realize you cannot lay more than 5 cards in that area, but suppose your opponent already has 5 trap cards, then you use a trap card (for example Creature Swap) to swap one of your monsters with theirs.... except that the monster you give them has 2 traps attached to it already. Now they have a total of 6 trap cards on their side. What happens? I've heard that they instantly loose and there is nothing they can do. True? Additionally, any other cool ideas on how to win using such "glitches" in the game.
No, you do not win the game if your opponent somehow controls 6 Trap cards. There are only three ways to win a game of Yu-gi-oh (page 26 or 30 in pdf):
There are no "glitches", or other ways of winning a game.