Care to explain me something?

[Mael]

You're still making the assumption that people are actually doing this for that reason.

Find someone who will tell you they intentionally pick on weaker clans under an alias for an ego boost and I will join you in calling them an insecure twerp. But you haven't convinced me there's any need to disclose previous aliases just because someone asked me to. You haven't convinced me you have any "right to know" anything.

Aliasing and playing your friends or randoms in competitive matches used to be the thing to do. Fake clans were created on a near daily basis for this purpose alone. It wasn't wrong then, it isn't wrong now, and I think you're just coddling players that got stomped and couldn't take the heat of embarrassment.