Here is what happens when you have a real attack:
1) The attacker can attempt a double spend
2) The attacker withholds a transaction to cause economic harm
Please don't give me some primitive list off an FAQ.
I'm not talking about some one time double spend, I'm talking about how the pools are so large of an attack vector, that it's trivial for governments to take over or impose their will on the network. Also how it's supposed to be a decentralized network without trusted 3rd parties, yet the tiny amount of mining pools are the trusted third parties. The protocol never actually succeeded in it's stated goals, and is currently just a giant fugazi.
Do you remember the initial Bitcoin premise and intro to the world? When Satoshi types he claims to have figured out a way to create decentralized consensus without trusted third parties? Everyone gives him credit like he actually succeeded.
He never did succeed.