I have made a couple of swords and used my angle grinder to rough out the bevels.I used my straight die grinder to grind the fullers.I have five angle grinders each with a different wheel so I dont have to change them all the time.I cant imagine being without my grinders.That said,yes they are dangerous.The worst problem is virbation or "chatter".If the workpiece is not held ridgidly or if the wheel binds in the cut you can literally see the grinding wheel lose diameter and degrade right before your eyes.Once a grinding wheel develops an imbalance due to a nick or broken edge its time to chuck it ,even if you just put it on there .It WILL explode!Also be extremely careful if using a wire brush wheel,the wires come flying right at your face!