Geez, guess it's a good thing I plan on meeting that with 2. ...h6! :D
That move , and even 2. .. f6 (which I think might be even better) , I faced a couple of times. My Bishop has been chased all the way back to g3 , but at a high price : Black's K-side is overextended. White can (and has) castle Q-side and storm the exposed Black King at high speed.
If you want me to , I can post a nice example. A correspondence game I played recently.
Geez, guess it's a good thing I plan on meeting that with 2. ...h6! :D