>> Entry tickets, if handled properly, could be a great way to fix the issue.

I disagree.

This seems like a "great way" to damage the tourism industry in Venice. In other words, I think this is a terrible way to deal with tourists who are visiting Venice, yet aren't spending enough money in Venice.

I think it would be better to require every adult tourist to buy, say, €10 worth of "Venice Money" which they could spend at any restaurant or shop in Venice during the day they are visiting. Too many tourists? Then increase it to, say, €15. Too few tourists? Then decrease it to, say, €5.

Part of the goal is to require tourists to spend a minimum amount of money while visiting Venice. Charging an admission fee seems too heavy-handed. Sure, I realize that my suggestion is tantamount to an admission fee, but it's likely to be more palatable to tourists. The goal isn't merely to get tourists to spend a sufficient amount of money in Venice; part of the goal is to make tourists happy to do so.

Tourists are notoriously fickle. Furthermore, they have myriad places in and around Italy, Europe, and, well, the world where they can spend their money. The current problem of too many tourists could very quickly turn into a problem of a dearth of tourists.

"Killing the goose that lays the golden egg" would obviously be foolish. I presume the economy in Venice benefits immensely from tourism. This is precisely the sort of measure that people tend to look back at in hindsight and exclaim, "How could we have committed such a blunder! What were we thinking?!?"

Having opined all of that, sure, I can see why denizens of Venice would welcome a measure that would decrease the number of tourists generally, and particularly the number of skinflint tourists who visit Venice, yet don't spend a single euro in Venice.

Also, frankly, I think it would be perfectly reasonable for Venice to enforce dress codes and behavior codes. For example, nobody wants an endless "parade" of motley dressed drunkards wandering around their neighborhood.

Personally I happily shop at Costco, but haven’t set foot in a Walmart in perhaps 20 years. I detest Walmart. Why? Part of the reason is this: Costco has a “greeter” standing at the enterance. Ostensibly the greeter’s job is to verify that people entering are members. In fact, that greeter is also eyeballing each person who enters and is empowered to deny enterance to people who don’t meet Costco’s minimum standards (which aren’t very high, but are still much, much higher than Walmart’s standards).

Similarly, one of the "secrets" to the success of Las Vegas strip is this: although they allow a lot of rowdy behavior, frankly, they actually keep a tight lid on things: a very, very, tight lid, which I presume you would have noticed if you’ve ever actually been there and paid attention.

It's a delicate balance which requires discretion bordering on sophisticated and subtle diplomacy.

For example, when dealing with "drunk idiots" the Las Vegas police tend to use kid gloves as much as possible. Why? The powers that be in Las Vegas want "visitors" (tourists) to tell their family, friends, and associates they had a great time on the Las Vegas strip. They also want most of the tourists themselves to return over, and over, and over again.

The same is true for a myriad of tourist destinations around the world.