Singapore is a very safe place
for travellers, though you shouldn't become complacent - muggings have been known to occur and theft from dormitories by other tourists is a common complaint.
Singapore is known locally as a " fine city ". There's a fine of S$500 for smoking in public places such as cinemas, trains, lifts, air-conditioned restaurants and shopping malls, and one of S$50 for "jaywalking" - crossing a main road within 50m of a pedestrian crossing or bridge. Littering carries a S$1000 fine, with offenders forced to do litter-picking duty, while eating or drinking on the MRT could cost you S$500. Other fines include those for urinating in lifts (some lifts are supposedly fitted with urine detectors), not flushing a public toilet and chewing gum (which is outlawed in Singapore). It's worth bearing all these offences in mind, since foreigners are not exempt from the various Singaporean punishments - as American Michael Fay discovered in 1994, when he was given four strokes of the cane for vandalism.
In Singapore, the possession of drugs - hard or soft - carries a hefty prison sentence and trafficking is punishable by the death penalty. If you are caught smuggling drugs into or out of the country, at the very best you are facing a long stretch in a foreign prison; at worst, you could be hanged.
Singapore's police , who wear dark blue, keep a fairly low profile, but are polite and helpful when approached.