Do you know how a defendant avoids fatal guilt when asked to prove something? Yes, they will ignore the request but they are active everywhere to post something. We basically have no right to force someone to respond to anything we suspect about them, including signing messages or anything like that. But if these defendants want to neutralize the situation so that people no longer doubt it then they will come to respond.

However, if you have valid evidence to say that the account has changed hands regardless of how it happened, then I just want you to be able to prove it. without needing to tell them about it. After all, you also don't have much evidence at this time to determine that the account has changed hands, but if you have any doubts about them, post neutral tag so you can avoid dealing with them in the future.