Small advertisers that rely on Facebook to spread marketing messages are up in arms over the social network's automated ad systems, complaining that inflexible account blocking tools and a lack of customer assistance are hurting business.

One digital marketer, Chris Raines, was setting up an advertising campaign on Facebook last week when his account abruptly stopped working. Raines uses his account to manage ads for clients' Facebook Pages. Without it, he couldn't do his job.

The lockout was a nuisance, but then Raines noticed something more concerning: A $3,000-per-day ad campaign that he'd set up for a client before his account was locked continued to run even though he could no longer manage it. Raines was spending his client's money without any way to control how.

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