But they cause heavy and serious nuisance.
Where I live, these monkeys invade gradens, agricultural fields, house rooftops at least 4-5 times a month.
The locals drop anything they do, and chase away these monkeys.
When chased by an adult male human, these monkeys don't fight back and are easily frightened. They don't mess with adult males or groups of humans.
A kid or a lone woman is not safe, though. When faced by them, monkeys gesture retaliation, and that is enough frightening.
An adult male cannot physically take on a monkey. It is impossible. Still they don't attack.
They steal bananas, mangos, guavas- all kinds of fruits, any food item not indoors, and destroy flowers and plants.
Thus, for families depending on these as their source of income have to always remain vigilant to monkey invasions. Common methods include- stone being thrown directly at them intending full harm, pebbles thrown by slingshots, and firecrackers. Banging metal objects loudly also seems to help.
We have mango groves that we lend on a yearly basis. The people who lease them from us establish outposts during the mango season which are always manned by at least one man with ready reinforcement in case of monkey invasion.
For those families not depending financially on tree products are also harmed. They make growing flowering plants difficult. They steal food from outdoors, and not to mention the awfully smelling solid and liquid excretion they leave on your rooftops.
(All rooftops are flat in the plains region, and they are important in our lives.)
By the way, I lost one pomelo (Citrus maxima) to a bunch of monkeys this very afternoon.