Slingshot and capsicum paintballs or lead fishing weights depending on your need.
Cheap, disposable and silent, and if you shoot from cover no one will be the wiser.
Excellent plan, with innumerable worthy applications......
UK Plans to clear undergrowth from gay sex spot branded discriminatory
And maybe someone with a good resistance to poison ivy could gather up a mess and start planting it in those fairy filled pestholes and give them something else to whine about.
There's always options if one just stands back and analyzes the situation.