Creating new account and post a accusation is act of cowards. Your accusation doesn't have value so much better if you post this and use your main account so that we can see you brave then maybe we can see your accusation is legit and not fake ones.
You may consider it an act of cowardice, but it does not matter and it is not wrong, the op probably doesn't want something controversial to be associated with their main account, like Theymos has said:
I don't have a problem with alt accounts as long as they're not used for evading bans. If you're hesitant to say something controversial because you don't want it to be associated with your name, please create an alt account and say it.
Their accusation will have value on the kind of proof they bring out, not the account they use to make the accusation.