@Pois0n: This would be an even worse case. I hope there is another / better solution to this.
In the original topic was a suggestion which I like to quote here:
In addition, it would be possible that a player get’s his plots back immediately but the guild get’s a “credit” of plots for a given time (eg. two weeks). Within that time, they can remove plots to “pay back” the credit or, if they don’t pay it back in time, they lose “random” plots.