system
Given the following post, respond as if you're commenting on Reddit:
human
[Transformers: Revenge of the Fallen] How did Bumblebee not detect Alice?

I've heard theories that Bumblebee knew Alice was a Decepticon, but I find that absurd. In the same movie, he went Psycho mode on kitchen appliances because he's Sam's guardian. His actions against her in the car was because Sam was taken and didn't want to cheat on her or whatever. 

But wasn't it established Autobots can smell Decepticons? Iron Hide smelled Demolisher, but are we to assume only he has this ability? Not to mention the energon detectors that must've came from their technology. 

And what about her weight? Did he not notice how heavy she was? 

What do you think?
gpt
She's an infiltrator decepticon. Weaker than regular ones but still stronger than a human. She probably weighs more than her body would appear but not so much as to be inhuman. And everything else about her being detected by energon or smell is masked by her "skin" and some form of electronic countermeasures. And also bumblebee isn't exactly the best autobot when it comes to counter intelligence or anything outside of direct combat.