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I know we enjoin people to: "DYOR", but i understand some of them do not know how to accurately do that, so they fall into the hands of some of these influencers who pitch scam/bad projects to them which doesn't end well. Thus even if investing is at your own risk, i think influencers should also be held responsible for promoting scams.
I don't know the laws in your country but I bet there are already rules that covers promoting some investment schemes and that should apply to cryptocurrencies as well. Each country should be clear that promoting a project without due diligence is also subject to punishment. Merely saying the popular "DYOR" and "Invest at your own risk" disclaimer shouldn't excuse them from legal action.