I heard philately would make you go blind.

Philately is the English transliteration of the French “philatélle” coined by Georges Herpin in 1864, to replace the disliked term timbromanie (stamp mania). Herpin took the Greek root word phil(o)- meaning “an attraction or affinity for something” and ateleia- meaning “exempt from duties and taxes”, which referred to the original purpose of stamps: delivery of goods or mail was paid by the receiver. A stamp, ink or paper, on the item indicated the fee had been paid by the sender.

Quoting from Tom Lehrer's song "Smut", which is about 60s era obscenity laws

Who needs a hobby like tennis or philately? / I've got a hobby: re-reading 'Lady Chatterley'