Almost any noun can be verbed, and vice versa. Usually reduces the clarity of a word form when you start to use it in another form. For example, while the noun "podium" is pretty clear, the verb made from podium could easily be "make a podium", "sleep under a podium" or something else intended by the speaker that is not the same as "finish in the top three and receive an award on a podium".

Impact is obviously in common use as a noun and a verb. I think the bigger issue here is all the examples of "leave an impact". My understanding is that the impact is the force of collison - it can't be left.

Or maybe I'm just Captain Pedantic.