I'm Nobody! Who are you?

I'm Nobody! Who are you?
Are you – Nobody – too?
Then there's a pair of us!
Don't tell! they'd advertise – you know!

How dreary – to be – Somebody!
How public – like a Frog –
To tell one's name – the livelong June –
To an admiring Bog!

Why does the narrator says not to inform anyone that they are nobody?
They will be banished.
They will be called out in the public.
They should not reveal secrets.
None of the choices