What you need to be suspicious of are people with high io and low keys run. If I see you sign up for my key and you have 2500 and have run like 20 keys I’m gonna assume you got carried. If you’re 2500 with dozens of keys done it looks way more like you earned it yourself.
Edit: download the raider io add on if you want to see a snap shot in game or manually look people up on that website.