They will know where she is going to so they can plan to get there. Not saying that's justification for the action against the tracker.
Let's say that they do and they even manage to show up at LAX 20 minutes before her plane lands. Now what? Honestly. It's not as if they can just hang around at the baggage claim and find her there. What do you think they can do now? Surround the entire airport and stop every single vehicle from leaving until they find the one with her in it?