Nothing prevent another dumb guy to do another dumb secession. But it will eventually die quickly if it does not catch the attention. Problem with this Bitcoin Unlimited weed is that they managed to make their scam look legit, so they fooled big names and now you see where we are.
Agreed. That's why i think so easy to make panic even the big names are falling for dumbs like BU. I wonder what will happen to my cold storage bitcoin if the hard fork do take place 
will i be able to use them on BU or i will be using it on Bitcoin code after the chain split?