Something of interest to note in this: there are almost as many SL residents against this solution as there are for this solution. The population is fairly evenly divided.
This sends one very clear message: This is likely not the best solution. When you have this many people against something, it often pays to re-consider possible alternatives.
For example right off the top of my head... allow Gachas, but:
* Have specific rules involved in their presentation and administration (for example, they're required to sell only different models of the same product, rather than "junk" along with "good stuff").
* The presentation texture must be very visible, accurate and obvious in what is being sold. (ie, "fine print" not allowed)
* Selling items of a significantly different nature in the same Gacha is not allowed (for example, a Porche Ultra Sportscar and a cheap VW bug).
I'm not saying these are "the" solution here. They're just concepts that come short of making Gachas illegal in entirety.
On the other hand, making them entirely illegal will certainly solve the problem entirely... until someone comes up with the next unethical scheme to rip off SL users. Because you can bet your L$ that is going to happen.