Santa Monica-based Unsubscribe.com, the startup headed by James Siminoff, which helped consumers unsubscribe from unwanted email, has been acquired by TrustedID. TrustedID, which provides credit and identity protection services, announced the acquisition on Tuesday afternoon, but did not disclose financial terms of the buy. Unsubscribe.com was venture backed by Charles River Ventures, First Round Capital, DFJ Frontier, and angel investors.