When an accusation is made, there are no set rules how one should address them. In my case, I mostly ignore threads are created in the Reputation board about me and maybe others can do the same if threads are created about them because not responding should not and does not imply guilt. However, I did send a PM to Learn Bitcoin asking him to post a direct response in that thread but he refused.
Not responding to an accusation (and getting a lawyer) might be prudent when you're dealing with the police, we're not talking about the judicial system here. It's been my observation over the years that if someone is called out in a thread--and assuming the accused is aware of the thread--a non-response usually
does imply guilt. The same goes for an accused member showing up in a thread and then sort of rage-quitting, followed by a disappearing act. I've seen that one a few times.
And Jesus, naim027 again? I thought I'd seen the last of that username, but I guess if there's money to be made here even a disgraced member can't bear to permanently leave. I haven't read the rest of this thread yet, but I bet by the time I'm done there will be decent evidence (or absolute proof) that Learn Bitcoin is indeed an alt of his. Let much egg be on my face if I'm wrong.