I have participated in PUmp and DUmp group but it's very risky there because they just tip in a coin and you accidentally buy the top and suddenly will dip so better risk your money that you're willing to lose.
I have watched the treads and even observed one pump and dump group but I still didn't decide will I ever join such a groups. In every investment, I am making the limitation on the money I am willing to lose and because of good management, I am the suitable investor for such a group. I am not afraid of the loos, instead, I have a different opinion about my enrollment in such manipulation and for me that, let's call it business model, is corrupted and rotten. There is no real knowledge in the profiting in such a way. If you are investing poorly then the money that will get back to you is also of the value you are participating with. To become experienced investor trader must learn from his mistakes and gain knowledge and not trying to manipulate with the market value of the specific coin with the instructions of the even higher manipulator.