Several years, (well probably a decade or more) I was walking my dogs across the fields, we don’t live in a dark sky area, but the major constellations are easy to see, and you can just see the milky way on a clear moonless night.
I have been aware of the ability to see satellites after dusk since my early teens from watching “The Sky at night” on the BBC.
Anyway, as I always walk the dogs at about 7.30pm, for half the year (UK) I walk in darkness, on this occasion the skies were clear and I was walking roughly north looking up and there was a small cluster of red lights coming towards me, usually strange lights start to flash as just over the horizon there is an airfield that serves small planes and helicopters but these were steady, high and very red.
ALIENS!
They came directly over me and disappeared south, getting home I went online and after a few false starts found one of the satellite tracking websites and it turned out there was a constellation of Italian geo-survey/military satellites coming over at that time, it didn’t mention red so I surmised that it was either the light being reflect as red due to dust/Raleigh scattering or they were made by Ferrari.
The point being that I didn’t specifically look for these but on investigation they could be found although with a bit of digging. Anyone can do this, just announcing “invisible satellites that are never seen.” Is just lazy and ill informed.