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It is up to us to improve Bitcoin and get rid from fraudulent and illegal activities involving Bitcoin. We should not support fraudulent and illegal activities, we should not protect criminals or scammers. Bitcoin is very useful but if some criminals will use Bitcoin to purchase a weapon, where possibly people are murdered from, Bitcoin will take damage and we should not support it.
Bitcoin has improved impressively since Silk Road was busted and Bitcoin growing will help Bitcoin to get independent from criminals and scammers.
Beginners should pay attention to avoid falling for criminals and scammers. Criminals and scammers are very deceitful.
because bitcoin is the best alternative right now for transactions other than fiat money and gold, so it's no wonder why criminals use bitcoin for their illegal transactions (we can say it's beyond our ability to control them)
but I am very grateful to blockchain companies and also the authorities for catching those who misuse bitcoin for their illegal transactions, hopefully all criminals who make bitcoin's image bad will be caught soon so that public trust in bitcoin will be stronger.