Depends on what they expect to happen. This has been done in Australia at least twice with different agents.
At least that's what some old guy told me when I was walking through the South Island on the TA.
> Pasture competition prevents new plants from establishing, though established plants are very competitive. Rabbit infestations have helped the spread of sweet brier by reducing pasture vigour. Cattle, possums and birds spread the seed by eating the fruits ("rose hips") produced around the seeds.