That's fine if you personally will accept them. It's good for people who are interested to be aware of issues that can happen with pin trading so they are not taken aback if they have things pointed out by other traders and they have no idea of the different quality pins out there.
It's also not a good feeling to find out after the fact that you have inadvertently traded a good Disney pin for a low quality Sedesma pin in the parks. Some people have no issues buying inferior pins and getting rid of them in the parks for better pins, but then someone who does not know better has a bad chance of trading a CM for those pins. Something to think about.......