Google claims that the amount of spam coming into Gmail is subsiding after several years of significant growth. Spam, as a percentage of email sent to Gmail accounts, has started to drop. Other analysts, including Forrester Research and Yahoo, think spam is on the rise, but less is making it to users' inboxes because of better filtering. Google, for example, can delete a spam message across its entire network once it's been reported by several users. However, a rise in "bacn" — agreed-to but unwanted notifications from services like Facebook informing you, say, that you've been poked — will increase the amount of stuff in our inboxes.