I used to buy the wrong stuff all the time, and I would just smoke it anyway. I didn't care at all, but then weed became legal, and it was easier to get the stuff you like. You can always learn where to get the good stuff from
https://bbgate.com/threads/crystallization-of-mephedrone-4mmc.72/ Crystallization of mephedrone. It's funny how it all changed in a few years. Most people were against weed, but once you try it you know it's good. Most of my friends smoke with me now, and it's awesome, it's what kept me going during the pandemic.