I wouldn't be surprised if they did, owing to the fact that a psyker has just crashed through the wall and only Andreas knows who she is
Well, they don't
yet know she's a psyker. Can't deny that they know she's come through the wall. (She did pulverise a heretic though, for whatever that might be worth.)
If anyone does take a poke at her, she probably won't be trying to kill them (given they're "not heretics" holed up with a known quantity), but that's not the same thing as saying she'll be gentle about it. Given she's currently boosted, even a pulled punch is going to be a serious blow.
I can actually imagine the reverse-telepathy fitting in fairly nicely here, though Steren should probably be careful if you want her to dig any further than that.
She doesn't tend to dig into people's minds most of the time. That's partly a deliberate narrative choice, so conversations with her don't end up with her predicting everyone else's sentences and being the only one speaking.
About the only thing she picks up on almost automatically is emotion (which, in my interpretation, is such a basic level of the mind that it's almost impossible to fake or block. Particularly to Steren's close examination, as she's also a biomancer who could read the chemical cues in someone's brain instead.)
Beyond that, surface thoughts take a bit more examination, and she tends not to put effort into reading them. She sometimes gets the odd piece though - in a similar way as looking at a page of text, you'll get some words, even if not deliberately reading it. To continue that analogy, thoughts with a particularly strong emotional cue attached to them are similar to bold or enlarged text.
She can delve further into memory and the like, but that's more like actively searching through the book to find things, and beyond finding simple details (like she did with Rosa's name) or certain recent memories, it's not usually worth the bother or increased risks.
So, if Andreas is worked up enough about it, she might pick up on the emotions and look a little further into it.
Let's just say there's a reason why there are now three trucks and a Salamander.
Three trucks and an
empty Salamander.
She won't have done any serious damage to the tank itself though, so it could in theory be driven again. Anyone that tried though would find an angry psyker coming at them at hyper speed* - unless there's a missile launcher on the floor, there'll be no pussyfooting around with discarded weapons.
*I'm not yet sure exactly how fast her top speed is, but at least 60 miles an hour at full boost.
I've neglected to describe exactly what most of the heretics have been carrying
If there's one on hand, she'd probably go for a lasgun first. Reliable, lethal, something she'd be able to use pretty much off the bat.
Alternatively, one idea I left on the drawing board was her stealing the heavy stubber (it's still outside of course, but she's bulletproof) and re-enacting the scene from Commando.