No.  No debtors prisons.  A weapon against them can be turned on us too.  They either pay it back, or are banned from entry until they do.    Also, for every invader found within our borders we shutdown BOTH borders for one minute.  1,000 invaders caught?  1,000 minute shutdown (1,440 minutes in a day).  I want to see Canada whining about Mexico's actions, and vis versa.