[missosoup]

They are aware of the limitations, read the carefully worded marketing on that page:

"When on target, they can prompt a drone to land safely on the spot or return to its point of takeoff, while cutting the video livestream back to the operator immediately."

Just because someone is making a product doesn't mean the product isn't stupid. I remember there was a mob making another anti-drone 'gun' which jammed GPS. That didn't end well for them.

Unless the target drone is actively being used in a hostile manner (as opposed to idiots flying where they shouldn't be), then removing the operator's control of the drone without establishing another means of control makes the situation more dangerous.