Hmmm, I’d suggest a little experiment. Note the angle of the crank and wheel valve stems in the pic and then next time you’re by there see if they’ve moved. Seems a little weird to me that someone would go through the trouble of stealing a bolted in seat post and not take anything else, like the rear wheel.
Pretty nice bike though. I’d leave a note on it but otherwise would just make a point of riding all my bikes by it at some point so they could see how good they got it with a roof over their saddles.
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N = '96 Colnago C40, '04 Wilier Alpe D'Huez, '10 Colnago EPS, '85 Merckx Pro, '89 Merckx Century, '86 Tommasini Professional, '04 Teschner Aero FX Pro, '05 Alan Carbon Cross, '86 De Rosa Professional, '82 Colnago Super, '95 Gios Compact Pro, '95 Carrera Zeus, '84 Basso Gap, ‘89 Cinelli Supercorsa, ‘83 Bianchi Specialissima, ‘VO Randonneur, Ritchey Breakaway Steel, '84 Paletti Super Prestige, Heron Randonneur