The document discusses several problems with online marketing techniques: 1. Some companies use fake blogs and "meat puppets" to promote products in a misleading way without revealing the true corporate source. 2. User information is sometimes collected and used by companies without proper consent or in ways that violate privacy policies. For example, AOL accidentally released users' search logs and MySpace had a security glitch exposing private profiles. 3. Marketing campaigns that encourage user-generated content can backfire if users create negative or parody videos, as happened with some contests run by Banana Boat and Chevy.