Is it safe? Intuitively, I get that it would seem even safer than flat benching because the body is angled downward and the bar can easily be rolled down to the safties.
The thing is, back when I was lifting in a gym, I've failed with an incline press and the bar got stuck on my face. Since the safties would be below chest level, I can easily see the bar being getting stuck above that on face or throat.