Would thry?

The ticket seller doesn't care if there's an empty hall, he got paid early on.

You're hoping that the scalpers don't get enough return to be able to justify continuing to play their role.

That "solution" suffers from the problem that requiring hundreds of thousands or even millions of people to get informed about and agree to do something all in the same time period (it won't work if some do it now and others only later) is incredibly more hard than it is for a few tens of people or maybe a couple hundred to as individuals swarm the sales venues and take all the tickets to resell them for more money.

Or putting things another way, it's a mountain to climb for large numbers of people to organise and stop scalpers (and that, only for a while, since if people stop doing it the scalpers will return), whilst in the current commercial environment scalpers appearing is a natural outcome.

This kind of thing usually requires changing the structures that make scalping so easy, rather than hoping that somehow (magic?) hundreds of thousands or miliions of people agree to do something.

PS: Yeah, a cultural change would be it, but expecting it to just happen and all at the same time (given that early adopters of that practice won't actually see any upside until a large enough mass of people have adopted it and they'll start giving up if too much time goes by whilst they're refraining from buying from scalpers and yet scalpers keep going because so many others are still doing it) is highly unrealistic.

If we all collectively agreed...

Gestures broadly