Will Google notify webmasters of violations of the webmaster guidelines?

“Whenever Google detects a violation of its Webmaster Guidelines, can we expect a feature to be added in Google Webmaster Central where it could help the webmasters learn what the issue was?”

This video is part of a “Grab Bag” series in which Matt Cutts, head of Google’s webspam team, answers questions from webmasters. We’re not currently taking new video questions, so your best bet for getting an answer about webmaster-related search issues is to head to our help forum:
https://www.google.com/support/forum/p/Webmasters?hl=en