The new proposal, put forward by mayor Luigi Brugnaro, would extend the law and would come into force next month if it's voted in at a council meeting.
But Marco Gasparinetti, who leads the residents' group Gruppo Aprile 25, told the Guardian: "There is such a long list of things that are forbidden in Venice there is nothing left that you can do.
"They would need to hire an extra 5000 officers to properly enforce everything."
Each summer a group of wardens, named the "angels of decorum", roam Venice, tackling tourist behaviour they find uncouth.
This includes eating in the street, being drunk and dipping toes or swimming in the city's famous canals.
The proposed ban comes after visitor-only routes to popular landmarks were introduced earlier this year ahead of a holiday weekend to keep tourists away from the locals.
They had long complained about excessive crowds – and the measure was also designed to help protect the city's quaint alleyways and thoroughfares.
The visitor-only routes were put in place for tourists heading to St Mark's Square and the Rialto Bridge.
And last year Venice banned the opening of new hotels and fast food restaurants in a bid to cap the number of tourists swarming through its streets.
Florence, too, has been policing its image fairly heavily - it has introduced fines of up to $880 for eating in the street.
