I would think it's the nature of the conviction, rationality and reason go out of the window. I was refused membership of a club (ie a drinking venue where only adults could be members) because of my conviction

"I'm not disagreeing with you at all - far from it, but there is a big difference between getting educated & joining a club".- Obviously, I was just pointing out the stigma against such offenders for relatively trivial things, thus an even greater stigma when applying to something that really matters like education

"why on earth would you need to declare any convictions when joining an adults club?" - I didn't declare, I was either googled or someone had seen and remembered my case in the papers years previously