"I often notice that I am one of ... that my BP is spiking unusually high during the workouts."
I wouldnt worry about it. It is extremely rare and life is full of much higher risks. Heavy sweating just means you are either working harder or your body has better cooling capacity. Red/purple face is an indication of heightened blood pressure, but that probably means you are just working harder. Paler skin displays this effect much more than tanner/darker skin. If you are progressing the weights properly and recovering well then you are conditioning your cardiovascular system right along with your muscles and thus it will be able to cope with higher blood pressure from heavier weights.