Quote Originally Posted by UniqueName View Post
Warehouses are quite pointless even in protecting resources. A better protection is to not have tons of unused resources, preferably spent on units which can protect your resources much better than a warehouse.
Warehouses are essential if you're the type of player who only checks up on their game once a day and can at times have millions of unspent resources when you return to your game 12-24 hours later. If I scout someone and see that they would present a fairly hard fight but they have 2-3 high level warehouses, I'd leave them alone no matter what my privateering research is doing.