it mainly depends on how your organisation operates, i know a few organisation that bill from numerous 'billers' - some people have a few businesses/shops running at once etc.. and require seperate billers
personally i see multiple billers as a core feature of Simple Invoices and would prefer not to 'hide' it in the Options menu
I can imagine that if you have multiple billers that you would see this. It is a very nice feature indeed, but I (and I think many other with me) don't need it (after configuring).
Is it a good idea to have the option to hide it? Its just an idea...
I use the biller section in two ways: 1. My business is a biller for invoices to my customers and 2. My suppliers are set up as billers so I can keep track of expenditure. For expenditure I use negative amounts for both invoice and payment.