I don't know whether to laugh or cry!
My kids have threatened an intervention and a 12-step program.
They and their friends (whose parents also bid heavily) joke about making a mock-umentary about ebay addition, as a wake-up call and service to humanity.
When their friends come over and see new items, they say, "Ah! bidding again, I see," with meaningful, sympathetic glances at my children.
Nevertheless, I only bid socially, and never more than I can handle, and never when driving!