They took my laptop in the back for just 30 minutes or so, after which I refused to accept it back from them or even touch it, which took another 2 hours or so. Eventually they agreed to dispose of it themselves.
What harm would happen if you touched it long enough to put it in a trash can? You were concerned they may have poisoned it or something? I completely understand not wanting to operate it since they could have backdoored it or put tracking devices in it, etc.