Baltar's schlong

Baltar's schlong is a weapon of mass destruction.

It's responsible for various crimes against humanity, all of which pertain to its use on, in or around Caprica-Six or her sisters.

Crimes

While Caprica-Six is accepting the schlong in her backdoor, she's also adding backdoors to Baltar's version of Windows, allowing Cylons to toast the Colonies (Miniseries, Night 1).
It leads to Baltar freeing Gina, allowing her to kill Helena Cain (Resurrection Ship, Part II). Later, Gina leads a peace movement along with goatee-less Comic Book Guy. To vie for her affections, Baltar gives her a nuclear warhead (Epiphanies)!
The schlong later makes its way into Gina. Although she's a psychological mess and, after the experience of the schlong, leads to a climax that destroys Cloud 9 (Lay Down Your Burdens, Part II). This leads to the Cylon occupation of New Caprica as they could not but notice the mess it left behind.
Later, the schlong is responsible for a hawt threesome between Three and Caprica-Six. The consequence of the schlong results in the boxing of all Threes by a crotchety frak.
Filled Tracey Anne with "God's presence". Virtual Six instigates this, by the way, and she likely watches... very pervy if you ask us.

Many Lee/Kara worshipers are pissed as the schlong made its way into Kara as well (Kobol's Last Gleaming, Part I). Ironically, this leads to Kara going back to Caprica and killing a Six. Ta-da.
Ordered by Saul Tigh, Tory Foster has her fill of "God's presence" in an attempt to get him to spill what he knows about the Final Five.