blocked referrers list enough?

hi, if you put a website on your blocked referrers list in this plug in is that all you need to do? or should you also send a disavow file to google?

quick added question, i am correct in thinking that a disalow file you send to google is just a spreadsheet with the list of domains you want blocked right?

with no https:// or no www.

anything else i need to know about that?

thanks