Don’t you just hate it when work follows you home? On Sunday, Courteney Cox revealed she has completed filming on “Scream 6” in a video posted on Instagram. Unfortunately, her longtime nemesis, Ghostface, didn’t get the memo. In the video, Cox sits down on her couch to relax when she notices something suspicious on her security cameras. “I just finished filming ‘Scream,’ I’m back from Montreal, and I’m so happy to have my work behind me,” the “Shining Vale” star said. However, her relaxation is short-lived when she spots Ghostface creeping closer and closer via her security cam footage. “Does . . .