Sure. If introducing a ban is the cause to increase the practice of Dorje Shugden, then turning down the heating in a room is the cause of increasing the temperature, reducing the number of plants in a field is the way to an abundant harvest and the way to increase the effect arising from any cause is to reduce the cause - in other words, the complete opposite of what is observed and understood from the laws of cause and effect.
It's totally illogical, Captain!
I think that a ban on the practice is not the same as turning down the heating or reducing the number of plants.
As i understand it, the ban is a decree from the Dalai Lama that says if you practice this,
1. you will harm my life
2. Tibet will not gain independence
3. you cannot be at any Tibetan monastery
4. you cannot attend any of my teachings.
Maybe a better analogy would be if there was a ban on eating durians.
There are people who love durians and there are people who hate them. And i bet there are many more people who don't even know what a durian is. Some people won't care what it is but some when some other people hear about the ban, they may be curious. What is this bloody thing people are making such a fuss out of?
Do you know what a durian is?
It's a very strange fruit found in Asia. And it's very much an acquired taste - stinks like an over ripe corpse in a drain.
Some people may follow the ban and NOT continue eating it, but many more who don't care much about the ban may try the fruit and like it.
Therefore, the fruit ban, which actually publicises the fruit, may result in an increase of people who like it.
Likewise, the Dalai Lama's ban - while the Dalai Lama is very much respected, i am sure there are many people who will not follow the ban on his say so. For example, in China, Dorje Shugden is one of the fastest growing practices! Can you imagine how many billion people there who will follow Shugden. In other places, people will google it (hopefully find websites like this, take part in the discussions and read the articles) and come to their own conclusion.
As an aside, I believe that in the 16th century, during King Henry VIII's time, he was considered a God King too and he (and several kings after him) decided to wipe out Catholicism. Of course there was much strife and suffering for Catholics in olde Englande then but today, Catholicism is alive and well in England. Likewise, I believe Dorje Shugden's practice will prevail - because Dorje Shugden himself has said that his time is coming, and you know what? I believe him