Would a list of banned websites (including why they are banned - e.g. self promotion, unsecure websites, bad customer service etc.) be useful? It would help to avoid deals being posted that subsequently get removed and also help to identify any really dodgy goings on.
edit: I'm posting this after almost responding to a thread about a nixelectronics.co.uk deal which was deleted by a mod. If a list existed, then the OP would see the name and reason for the ban and then not waste their time or other posters time by starting a thread.