It depends on the purpose of your education. In an ideal world, it would be just to learn, but I think employers at some level look at grades/school as a qualification process.
I see where you are coming from but were I interviewing you I would never even think to wonder about a self reported grade in a volunteer class. If the topic was important to the position I'd ask you to talk about it and tell me what you learned. I would hope I could spot you trying to feed me a line.
At the end of the day, as an employer, I am looking for 'learners' not 'cheaters.' If it turns out that an employee's personality/choices lean toward the cheating side I try to manage them out of the organization as smoothly as I can.
Hmm, that is a fair question. I think I would give more weight to a class if they took it when they didn't have to, rather than having taken is a part of a requirement for a degree.
At the end of the day, as an employer, I am looking for 'learners' not 'cheaters.' If it turns out that an employee's personality/choices lean toward the cheating side I try to manage them out of the organization as smoothly as I can.