Perhaps, but given the volume and variety of modern electronics, it's easier than ever for a receiver to look like something else, at least if you don't crack open the case. An antenna can be harder to conceal, but you can often pick up transmissions by tying into unconventional antennas, like the rebar in a slab of concrete, or a long metal railing. You could probably fit a purpose-built receiver / demodulator for FT8 in a usb stick.