In North America (US and Canada, at least), it is considered rude to indiscriminately honk the horn. But in New York City (Manhattan), its almost like Manila there, with mostly the taxi and limo drivers honking at each other and other vehicles.
Speaking of beggars in Manila, I try avoiding giving to them since they belong to a syndicate esp. the old women. This happened in Adriatico cor. Quirino (beside Victoria Court and Manila Zoo), a driver gives some money to a begging old lady then suddenly all of her "colleagues" suddenly gather around the vehicle. In another separate incident, I see the same old lady along with her "colleagues" hanging out inside a passenger jeepney after a whole day of "work".