I’m just guessing here but I would think that cooking would kill off anything picked up from the thawing process.

It’s nasty, but not necessarily unsafe.

Not necessarily toxins (as in ones produced by bacterial/fungal processes) or toxic/bad-tasting chemicals left over from cleaning dishes.

Assuming dishes have been cleaned and not just rinsed/wiped

If they’re cleaned in a sink that just had raw meat floating around, they’re not clean regardless.