interference with a public servant in the execution of his or her duties
disturbance of sleep; nuisance in the middle of the night
obstruction of business; interference with business
interference; obstruction; sabotage
obstruction of business; interference with business; interference with somebody's duties
electromagnetic interference; EMI
interference (esp. in horse racing)
(crime of) obstruction; obstruction charge
obstruction of proceedings; filibuster
jammer (e.g. radio signals); interceptor (aircraft)
obstructive tactics; harassing tactics