By Sam Edwards, Isla Binnie and Maja Zuvela BARCELONA/ROME/SARAJEVO (Reuters) - Chronic overcrowding in some of Europe's beloved tourism hotspots is fuelling an angry backlash, from polite protest to "Go Home" graffiti and even physical intimidation. Across southern Europe, from the choked boulevards of Gaudi's Barcelona to the swarms of cruise liners disgorging passengers into Croatia's mediaeval Dubrovnik, residents are complaining that a sharp rise in tourism is making life intolerable. The backlash has sparked concerns for one of the region's biggest economic drivers and prompted authorities to act.



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