All the time. There's occasionally even websites that outright block me without challenge, run many iterations on my machine, or present a tiresome amount of CAPTCHAs (Waymo machine vision must be trained pretty well, from me labeling goddamn traffic lights, motorcycles and stairs throughout the day). Especially CAPTCHAs that load new pictures with an infuriatingly slow fade animation drive me up the wall; one of which possibly not even sufficient.
But I take it as a compliment, as it might mean my browser profile is minimal enough to trip these systems into thinking it's a headless browser (typically used for bot traffic).
