How would one recognise if a Buddhist group is a cult?

How would one recognise if a sangha or Buddhist group is a cult or has cult type tendencies. Are there well established things to look out for? Are there cult type behaviours or patterns that would be particularly linked with Buddhism or are all cults broadly similar irrespective of their religious inspiration? We have tried to answer questions about cults before here and here however these questions have been closed down as too opinion based. However I'm hoping by broadening the scope and moving it away from any one group it may help to keep this more objective. Also I would imagine that there are scholarly studies in this area so I'm hoping that this will also assist in objectivity. As a side note I'm aware that the term cult is a controversial and emotionally weighted term. It's difficult to get a good definition but I found one here that seems reasonable > A group or movement is theologically a cult if it identifies itself as > belonging to a mainstream, recognized religion — and yet rejects or > otherwise violates one or more of the central, essential teachings of > that religion. however I welcome any other definitions too.