The thing with Indonesian is they're not only talking a broken english but a broken Bahasa Indonesia too. That makes Google a little bit confused. Lol
Let me translate this quote:


- tambahan ada surat terbuka di kaskus = There's an open letter on Kaskus (about this scammer) *this means that the scammer is a really known scammer

- ini facebook pagenya dia = This is a link to his (the scammer) Facebook page

- saran dari saya searching di google sblm transaksi dengan siappun
ceck no. banknya dulu nama pemilik dll. = My advice is you better google the bank account number/account holder before the transaction.

So, that one user isn't really asking for other proof, but he's confirming Miracle* that the scammer is a scammer.

Cheers!