Ok, so I've been messing around with different proxies trying to figure out how sites actually spot the fake traffic. It's like trying to spot the wolf in sheep's clothing but the sheep are all dressed up in sheep masks. You got providers like Bright Data and Oxylabs claiming they got the 'most stealth' residential proxies but then I see the same sites get whacked when I switch to their IP pools. Makes you wonder if the detection isn't just about the IPs but how you use them. I mean, some sites have insane fingerprinting - canvas fingerprint, browser behavior, timing, all that spammy stuff that even a decent residential proxy can't outrun if your script is sloppy. So yeah, providers that brag about raw IPs w/o anti-fingerprinting support are just giving you a false sense of security. Then there's datacenter proxies - cheap as hell and easily detected if you're not careful. They tend to trip up on simple checks like headers or geolocation mismatch. And mobile proxies? Man, those are tricky. The providers that have legit mobile carriers seem to do better but even then, if you're not mimicking real device behavior you're toast. I think the key is not just the proxy type but how you configure and mask your footprint. Proxy detection isn't just about the IPs anymore but the entire digital handshake you're doing behind the scenes. So when picking providers or building your setup, don't just chase the lowest price or the biggest claimed stealth. Dig into what they really do to hide the fingerprint, how often they rotate IPs and whether their proxies are actually fresh or recycled from a pool that gets flagged all the time. It's messy, but that's the game now. Just a brutal truth I've learned after banging my head on the wall for months.