Quoting ♛ Rudeness.:" Whoa you have that smurf twisted because I don't give two smurfs what my BD or whom he does it with, that's ... [snip!] ... does it with, that's none of my business, but who my daughter is around and what she hears IS. No, I HAVE to keep them apart."
You very obviously care what he's doing and with whom. Your entire OP is riddled with senseless drama that doesn't involve you.
He is your daughter's father and his life does not involve you. Your daughter has visitation with him and when he's there, you have no control over what he does. You obviously trust him enough to have your daughter with him, which means you trust him enough to make good decisions about the people he chooses to have around your daughter.
No judge is going to care to hear about your drama.
You two need to realize that your separate lives are not the business of one another and never will be. If you trust him to be with her alone, you're agreeing to trust his decisions when she's around and vice versa. If you don't trust him anymore, take him to court....but sitting around snooping and involving yourself in someone else's personal life isn't going to do anything.