Ex 1: depends on how fast you're going. If going considerably slower than normal traffic, keep to the right.
Ex 2: pure fantasy. I will go out on a limb here and claim this has never happened. The large vehicle driver isn't going to just approach you as if you're not there if he's going to have to move left to pass you. Surfers are much more likely to be eaten by sharks than a cyclist is to be eaten by a truck in this type of situation. You shouldn't think about it for the same reason that surfers shouldn't think about sharks - it's too unlikely to happen, and the only solution is to not do your thing (surfing, cycling).
As to your earlier examples, in the first one, what would you do if riding a motorcycle? And what non-VC action are you suggesting a cyclist should do? By the way, it's acceptable to ignore a non-functioning traffic signal, which one that cannot recognize your presence arguably is, as long as you yield the ROW appropriately. In the second, it's non-VC to keep to the right on front street as you cross mound street... you should ride far enough left to be visible and predictable (to make it obvious that you're going straight, not turning right onto mound, to discourage right hooks). What non-VC action are you suggesting should be taken here?
Do you believe that car drivers sometimes have to violate the rules of the road to be safe? Motorcycle drivers? Why only bike riders?
Serge