First of all, it's unethical to go on playing if you jump around and reach to points where you aren't at. You should answer that part yourself. It all comes back to your personality, your morality and your principles in life.
The technical part has already been answered by Claus. I can only add to it that it is very hard in this era to have a bad GPS reception. You always have the option of turning on wifi. If you're complaining about battery drainage then you should remember that nearly all serious ingress players do carry a battery pack with them. You should acquire one, too.
I, myself experience bad reception from time to time (very rarely) and when I experience it, I don't abuse it. I stop playing and go on my way.