Canada's national soccer teams have been accused of using drones to spy on opponent's practices for many years. Not exactly the same, but in the same ballpark as Connor Stalions.  I wonder how often this happens in sports. On one hand you would think it would be easy to spot a drone over your field, but also maybe it's not something you're on the watch for.

https://www.tsn.ca/canada-s-men-s-and-women-s-soccer-teams-have-relied-on-drones-and-spying-for-years-sources-say-1.2153674