This is a tough one preflop. A limp/re-raise is a pretty sophisticated play for a complete donk. That's not to say you won't find 77 here often enough to make pushing +EV. I'm interested to see what people would do. At the 22's is it going to cost you to give an opponent that much credit? I personally don't hate the cold call. Once you see that flop it's an autopush.