With the rise of these tracking services a cat-and-mouse-situation was foreseeable all along, especially for security related type of flights. Probably already

With the rise of these tracking services a cat-and-mouse-situation was foreseeable all along, especially for security related type of flights. Probably already happening for intelligence operations. I assume the obfuscation makes sense for deportation-flights, but one could argue that keeping it transparent would be a political win. So what might be the reason? Keeping the involved staff safe?