Wow. That's pretty funny!
If you are
ever seeing "visible issues" occur from overclocking, I've got news for you:
You have already damaged your hardware. The real question at that point is, "How badly have I damaged my hardware?"
When you are seeing "visible issues", you are seeing the results of logic gates/transistors/silicon operating improperly due to signals operating the wrong way (probably due to over-saturation, ground loops, or other signal anomalies). You have sent electrons (or holes?) to areas they weren't intended to go.
So, since you have operated at least one transistor outside of it's maximum operating range, you have weakened it - and possibly other hardware. You may not see the results immediately, or maybe you will. The first time you see "visible issues" may also be the last time your PC will properly boot.
You may also have just weakened the circuitry a minor amount, so that a PC that would have lasted 3 years without any problem may now only last 2 years. You won't see the effect for a long time after you experimented with overclocking. Just because you don't see immediate death from overclocking doesn't mean that the circuitry hasn't been damaged.