if you want to see lots of spike, go to Norway for instance around ENEI.
Interestingly, the spikes disappear when you get close to them, are are replaced by perfectly good terrain, and as soon as you go further than a certain distance, they appear again.
But I agree it’s a relatively minor annoyance.
For something more annoying, you may want to try a bushtrip and as soon as you start the chronometer, you’ll lose complete control of your aircraft and that’s for good, I haven’t found a way to regain control. This happens quite randomly, but it’s rather irritating.