In London or New York, it might be regarded as commonplace - witty stencils and stickers posted by an artist around public spaces.
In Singapore, a city obsessed with order and where "vandals" can be flogged, 27-year-old Samantha Lo - the so-called "Sticker Lady" - has inspired an online campaign after being arrested for posting stickers.
Lo, founder of an online arts magazine, has been arrested for sticking messages on traffic signal buttons, including "Press to Time Travel" or "Press to Stop Time", as well as on suspicion of painting messages on roads reading "My Grandfather Road" - a Singaporean pun on bad driving and, some believe, the out-of-touch Government of Singapore.
Lo's arrest, which has been condemned by more than 14,000 people who have signed an online petition calling for leniency in the way she is treated, has triggered soul-searching in the city state, which is infamous for its enforcement of social order and banned the sale of chewing gum to keep its pavements clean.
If charged under Singapore's draconian 1966 vandalism law, Lo could face up to three years in jail and a US$2000 ($2600) fine. Men who are convicted also receive three strokes of the cane.