I'm going to side with the Chrome team on this one. There's very few occasions when autocomplete being disabled makes sense, the vast majority are just developers dumping it in there because they want to make doubly-sure the user actually entered a field by hand (e.g. email addresses) and often for vaporous reasons like "Improve Data Quality," "Stop Spammers/Bots," and "Make sure the user enters the right data in the right box."

Ultimately if you want to assure data quality then use data or format validation, or verification (e.g. send an email with link). If you want to stop bots/spammers use captcha.

We did go through a period where people were "misusing" standard input boxes for other things and autocomplete would ruin that extra usage. But hopefully we've moved beyond turning an input box into a richtextbox using a complex array of hacks, and can now instead use things like Canvas.

PS - Hopefully they disable "smooth scroll" scripts next. So tired of having my scrolling ruined by "helpful" sites.