Exactly. Dirty politics weren't invented in the 20th century.
You're right. Indirik's idea is fine for example: just kick out a small piece of land from your realm in order for the person to be kicked out along. You can even then try to reconquer that land without the offending person.
It's the contriveness of the region coming back immediately afterwards that bothers me. Changing allegiance is a serious matter, you don't do it once just planning to undo it the day after.
