It was no secret to anyone that knew the wizard that Rodolphus had a terrible drinking problem. He always had, even before he was chucked into Azkaban. Life with the dementors only encouraged him to drink even more when he escaped. The death of his beloved wife didn't help matters. But, every Death Eater had their favorite vice. They had to in order to get through the horrors of their lives. Rodolphus had been able to get his drinking somewhat under control, only indulging when he was truly upset.