I can't relate to this at all! If I have a broken clip, I can't get the plug to stay in for more than about 5 minutes. And I never route the ethernet cord somewhere where I'll trip on it...
Hesitant to admit this, but the cable between my antenna and router is missing the clip one side, and has been for far longer than since I moved in and set it up; seems to work fine. /shrugs
