But until they've investigated (in this case made a phone call), how do they know which reports are malicious and which are not?
There are a great number of malicious calls made, SS know this and, when it's obviously a malicious call, the case is closed. But they don't know which are which until they've looked into it.
They can't just decide its malicious because the person is a household name from the telly. I'm amazed anyone cant work that out for themselves tbh.
Money and fame don't guarantee you're a good person. Surely we've learnt that from numerous examples over the past few years!