So, if the account is new then why do you afraid to share the proofs too. I think you afraid if you would made this account from your real id then those merit source might not give you merits if they are giving you few. Well, i am not accusing but if you have solid proof then you can share those even from your main id nothing to afraid of. Merits are not everything.
If he has any real proofs, he'll get many merits for sharing them. Doesn't matter from this account of from any other account will it publish any proofs. But he doesn't have any, only frustration about not getting merits.
I'm not following all merit sources, but those several ones I see spend merits widely and for really many different people. So if there were any proofs, I'm sure they'd give merits for good investigation about possible abuser. There is no risk if to have proof. But he has no.