I'm always confused about what exactly is considered BS in this game. Is it related to ennemies' abilities working as intended (like Banshees teleporting through walls) or bugs (like Phantoms' on-host DR) ? Some assumptions :
- Reapers : as I said, Banshees teleporting through walls, or grabbing you from 15 meters away in laggy games ?
- Cerberus : Atlases' magic rockets I guess, phantoms on-host DR.
- Geth : stagger abilities (but we can stagger ennemies, so why they shouldn't be able to do it too ?), Primes' super accuracy (but hey, they are robots).
- Collectors : Praetorians' lazors penetrating cover, ignoring shield gate or fired from the back ? Sometimes, I'm also wondering how Scions can have so many grenades...
So, it seems to me that each faction has an equal amount of BS. However, I admit that Collectors have an advantage : they are the hardest to trivialize.