I see that there is a reason to implement changes in rule which says "how many times you can change guild". For example: When some guild is attacking mine, somehow before siege they double amount of players which are allowed to take part in the siege and who come from other guild. After siege "new" players come back to their own guild. In that way one guild with some puppet-guilds can dominate the whole realm. It is unfair I think. A player should have the possibility to change guild as many times as he wants but he shouldn't be allowed to come back to one guild more than 2 times.
Sorry for my English, I hope that you would understand me...