Np, it's made me into a person who doesn't take crap from anybody.
On topic, thinking about it I've been told some pretty awful secrets by people, and most things are fine to just hear and ignore. Some of them darkly funny in their own way. I mean one person confessed to me of stealing someone's ashes because they didn't want someone else to be the one to bury them (family infighting), and filling their casket with charcoal or something like that, so the other person buried some charcoal with great ceremony. I mean that's just hilarious in an awful way, but none of my business really. I kept the secret from who it was supposed to be kept from. Wouldn't do any good telling them anyway.
So I thought a while about this question and came to the conclusion that most secrets are fine. I'd only really have a problem if someone came to me and told me they'd got ten people in their freezer or were abusing kids. Yep, I'd turn on my best friend if they turned out to be a murderous sex pest. Gotta draw the line somewhere.
I wouldn't care if they robbed a bank or whatever. In fact I know people who are serial fraudsters and can't help concocting one scheme after another to fake this or forge that, and it's fairly harmless since they're so inept. It's like a bad TV show.