Had a similar situation a decade or so ago, although I wasn't too involved/close and to be honest, I'm not sure if I've ever considered the relatives in question as "nice" anyway. Therefore, it hadn't really affected me apart from not speaking to the relatives in question since that situation.
Family member passed away. A few relatives, who cut off any sort of communication with that family member for 5 or so years prior to their death, made an appearance during the funeral to pretend that they cared when in reality they did not. The family member who died had a large amount of inheritance money, so obviously these relatives, who stopped giving a care about the family member until they passed away, wanted their hands all over that money. Arguments were had with the son of the family member, who was very upset that these relatives suddenly waltzed back into the picture and were demanding the money from the dead family member. Relatives made abusive threats in response and I believe they all cut ties shortly after that.
Again, I wasn't really affected by this and thankfully I've never really been close to these relatives or spoken to them apart from the odd large family event, so simply not having them in my life since that situation has been easy. It just goes to show how some people can turn really nasty over money.