you can't stop people from copying an open source code and create their own version of it. and also this is a free market and it must remain like that which means anybody is free to create a new coin and release it to the public.
the only thing you can do is to start educating others (the newbies) so that they can understand the difference between a real project and a real coin like bitcoin and a shitcoin copy like bitcoincash. if you do that, then you automatically and eventually stop "forks shit".
We are already trying to tell all people from here and other crypto related forums. But it is not enough. There are so many people has alrady got in this world. But less people know what is really going on.
it is not ineffective though. what we do is good and it is one step closer to educating everyone. the problem is that we are fighting millions of dollars worth of advertisement that has already brainwashed a lot of people and are still in full force so you can't really expect a small attempt like this to be able to break this mentality overnight.