Sometimes I highlight recently closed transactions, picture of a happy customer, etc. but don't link to properties for sale unless I am holding an open house.  

Besides posting on yelp or Angie's list, is there anyway to let potential future customers to know that these people are unscrupulous?

It could be just labeled as a monthly assessment fee, and not use the words HOA.  

you type in (or cut/paste) all the addresses (they have a button labelled Import,  but it just pops up a text box for entering the addresses).  

Tenants are customers...

I was working on a bid for customer, they seemed on the up and up.

It is rare for a builder to *not* finish out a subdevelopment.Are you building a custom house on their lot?

Remember, the credit card company is the advocate for their customer and are looking to protect them, the tenant. 

Instead as an example a broker/agent can have a client buyer/seller they represent and then have the opposite party as a customer performing ministerial acts.There is also deginated agency where you can designate different agents within a brokerage to work with opposing parties.   

I often see properties labeled as a "cosmetic rehabs" and find out upon entry that it's much more than cosmetic.