Fears over being associated with "unsavory" content continues to make advertisers hesitant to make the leap to hot social media sites such as MySpace and YouTube.

As a compromise, many user-generated sites are creating special areas or channels that shield ad placements from objectionable content, AdWeek reports, citing various speakers at Interactive Advertising Bureau's MIXX Conference. For example, MySpace has created channels organized by content, ensuring advertisers that their placements won't be seen on MySpace's racier profiles.

What remains to be seen is whether MySpace and YouTube's community of users will spend as much time visiting these "safe areas" as they spend visiting the main site.