No, I don't think so, I've become a better judge of character as I got older. I'm not apt to give any chances if my intuition tells me not to. If someone really deserves a second chance, though, I'll give it.
I'm with everybody else here. Depends on the person, and why they would need a second chance. When I was younger, there were people in my life I gave 50 chances to, but I regret every one of those decisions. Guess the older I get, the less BS I want to put up with.