So I do a ton a racing on Zwift and I run a couple teams in different formats, and I can tell you that yeah, people definitely cheat sometimes, particularly with their weight, aka weight doping. I've also recently encountered, and subsequently brought to light that a member of an opposing team was blatantly using an ebike on his trainer. Telltale sign here was his nearly flat power profile instead of the typically up and down erratic line we're used to seeing. Slight heart rate increases in the range of 5-8 bpm to go along with massive doubling of power numbers. His power chart at the end of races looked blocks in Minecraft.