For honesnt, you can read this article :
https://bitcoinmagazine.com/articles/chainalysis-most-mixed-bitcoin-not-used-for-illicit-purposes Which states:
@Most Mixed Bitcoin Not Used for Illicit Purposes@Specifically, Chainalysis believes that 8.1 percent of all mixed coins were stolen, while only 2.7 percent of coins had been used on darknet markets.
AK47? Granade?
Protecting yourself is good. At lest, bying AK47 soesn't mean that person is bad. It depends for what reason you're buying it

Who cares percentages? (Ive already knew)
You dont understand the main idea.
They are part of the
Bitcoin ecosystem.
You cant forbid one of them.