Don't make a problem that you hate even worse, just because you can!

If you hated paying high rent or paying for an overpriced house, don't charge exorbitant rent when it's your turn to be a landlord.

Same goes for concert tickets. If you hate paying €100/ €200 or more for a ticket, don't re-sell them for more than you bought them for, just because you can no longer attend and want to make a buck.

Don't make a problem worse, that's Fiat mindset. Be better! Be the change you want to see in the world.