The added government provided security of a few rich foreign figure heads visiting will disrupt traffic flows in a lot of areas.

Edit: In case you think I am over stating the costs

>"The number goes into the millions of dollars," Davis said. "It's an expensive endeavor."

> He says it's something the city prepares for. "The budget does prepare for these types of events," Davis said. "Boston is a world class city and these are the kind of expenses that a world class city has to incur to maintain that designation."

Boston should not be incurring the costs of securing the persons of random figure heads worth billions. If the British government still holds them in such high regards that they view them as part of their government then they should be the ones paying for the security and not the Boston tax payers.