LMAO stop thinking you're going to hurt something!
Dead shocks will be lots of small deflection oscilations and minimal toe change so I can't see it being an issue.
On big hits enough to affect toe like you're thinking the car would be a kangaroo and undrivable.
Our suspension is pretty good regarding bumpsteer front and rear as there's minimal geometry change compared to some cars (My Z car bumpsteered like a bitch)
There's a point though when you lower the rear you run out of adjustment so you can have either good toe or good camber but not both so maybe the OP is right at that point?
I did an 1800 KM round trip with crap toe out on the rear, didn't notice any tire wear and the car was insanely stable at high speed but didn't want to turn in for corners.