Thank you! We're working on reaching more people in the industry and more retailers, and this Kickstarter has been amazingly helpful. We know it's just a start - but we're excited about the start!

I have never seen a serial number that has been filed off. They're generally pretty deeply engrave (in metal frames) and so obscuring them would threaten the structural integrity of your bottom bracket.

Perhaps when the Bike Index is larger, this will be a bigger issue, but it hasn't been an issue yet.

As for parting out, yes, that's a big problem. We're thinking up a clever solution for tracking parts, but we haven't yet nailed it down.

Most of the time the serial number sticker is under paint or a last carbon layup - so it's tough to remove. It can be painted over - but that is obvious and suspicious.