afaik, this is not possible.
addresses are never duplicated, that's the whole thing about bitcoin algos and p2p - period.
unless you were actually controlling a remote pc holding one of the addresses on it, there is no way in hell you'd ever see random donations/transfers

That is incorrect. There is no network validation of addresses. They are completely "random" by the node who generated them. There is a very non-0 chance that two nodes can generate the same address, and nobody would be none the wiser.