Most blackhats would....They have no problem talking about it (well the ones ive met) I guess it just depends on if they're comfortable enough with what they make using blackhat
I wouldn't really know what blackhat techniques were to be honest, but I won't say i've always had an aversion to crossing lines... I weigh the consequence with the reward... just how bad is it.. will i get away with it... what will i gain?
If by Black Hat Techniques you mean cloaking and MFA page generators, I once used them, but have made my confession and repented. They didn't work that great anyway.