Anyway, I believe the exchanges may be arranging something like this anyway? Or some group is. I recall the NobleCoin dev commenting on some groups forming as a way to rate coins. If they charge for it, it's bad news.
Actually, if they charged the users for it, it would be a good thing.
Back in tha day, the bond ratings agencies were honest. They were honest because they were paid by the bond
buyers: they realized that pump games or naivete would hurt the very people that were paying them. Said investors had no qualms about taking their business elsewhere, so if a rating agency had even a minor oops - let alone the fustercluck that was revealed in '08 - its pocketbook got whacked.
What changed? The revenue stream. Around the 1980s or so, the ratings agencies began collecting their pay from the bond
issuers. Now you can see why their eyes became starrier and rainbow-filled! If an agency was too skeptical, the issuer paying the bills would take his business elsewhere. There was a cultural lag and concern for the brand, but eventually the ratings agencies became as compromised as the research departments of financial institutions with corporate-finance departments.
So...if an honest and reputable altcoin rating service came along that was financed totally by
buyers of altcoins, they'd have to be pro-buyer. Every buyer they get into trouble adds to the risk of them going tarts-up.