I don't think it will happen because a big thing that I know , may be few people will know about it if they got scammed indirectly by the coinbase .
If anyone here will be old user of the bitcoin who used ever btcjam then surely he knows that if you have coinbase account and have btcjam account with the same email id then if anyone will take loan from your account of btcjam then without need of any permission from the coin ASE account the btc will transfer into the loan taker perosn address , what is this ? , Only a type of scam Because I don't know how someone hacked my account , or it was the team of the btcjam who hacked my account and made withdrawal of the btc through the loan taking and approve from my own account that was backed by them/hacker and steal my 0.26btc , And when I asked them about this and aksed about the details of that person who take the bitcoin by mine account then they refused me to give any detail and help at all .
So here we can understand well that how the coinbase was in contact with the btcjam like stupid and fraud service , so we can understand that coinbase can make such things in future also .
Note: here I am not saying that coinbase is scam/bad service/anything wrong , but probably that should be responsiblities of the coinbase to merge Thier service with good and reputable thing , so here i will no more support coinbase , but no doubt that coinbase have really a better service to make buy and sell of the bitcoin in worldwide