perils of seed catalogues, etc.

Linn, at the optimistic gardener writes beautifully about a lethal disorder that plagues many gardeners such as me. It has something to do with a tendency to order way too many seeds combined with forgetfullness....Those are the symptoms, anyhow. What to call this disorder or what it's cause might be? Idiopathic, no doubt, but lethal nevertheless, at least to many potentially beautiful seeds and seedlings. Ah, me!!