Well yes, I've a pretty good idea on what kind of stuff I'd regret, heh. And it's based on experience, imagine that eh ? Additionally, I can also draw on my friends for evidence of that, none of them have ever mentioned regretting pirating - not even the game developers. But really, pointless as you believe what you want to, and the "don't do it because you'll regret it" on the conscience level is pretty weak (rather look at the legal system making you do so, heh).
Not sure what you mean by my 'youth' (although that is relative when you think about it, you might be 60!), given how I've not sated your apparent desire to know how old I am.