A disgruntled customer enters a local department store and proceeds to stand directly in front of one of the cash registers. The disgruntled
customer stops each person bringing a purchase to the register and says
that the price or quality is better at a competing store. What, if any, laws
can be enforced at this point to assist the store owner? How does this
change if the store owner requests that the disgruntled customer leave and
he refuses? What action should a peace officer take at this point?

The disgruntled customer is obstructing lawful business or occupation carried on by the owner of the land. The disgruntled cannot be stoping people who are tying to make a purchase and must leave. A LEO should use PC 602 is trespassing and the owner should be present to establish facts from the customer. I would talk to the customer and tell him that he needs to leave and cant do that and if he doesn't he can go to jail. If the person continues then i would then have to force him out.

Explanation:

i think it can have both positive and negative effects on businesses.

for example:

lets say you own a small business and taxes go up 4% that means it is going to cost your business more money to buy product to sell. but at the same time you make more money from the tax rise.

that is my theory.

explanation:

magic