Mysore Road corridor: Builder defaults ka ground reality kya hai?

Honestly, I'm a bit shaken after hearing about builder issues near Nayandahalli. My friend almost lost his booking amount due to a land dispute on Mysore Road. Ab samajh nahi aa raha, OC aur RERA check karna hi kaafi hai kya? Kya is corridor mein legal issues ya builder defaults zyada hain? Any red flags?