wear-and-tear wise it ought to be fine. special "outdoor" cable would be better though.
from the consideration of data safety? no, wired cables are as secure as an armoured train in comparison to any type of wireless.
Ethernet cables emit very little EM in the first place, and because they're twisted, after more than about 1cm away from the cable all the EM would jumble together.
i'd estimate that harvesting data from even a humble CAT.5 cable without physically connecting a device to the conductors themselves is almost impossible.