The tourist industry of St. Petersburg – Russia’s second-largest city and one of its most popular destinations – may suffer because of a new bill against homosexuals, which local lawmakers are preparing to adopt amid protests.

In an international campaign launched online this week, foreign tourists are urged to inform St. Petersburg Governor Georgy Poltavchenko that they would boycott the city if the local parliament passes a bill against “promoting sodomy, lesbianism, bi-sexuality and transgenderism to minors.”

“If this bill is signed in to law, I will not and cannot travel to St. Petersburg, and will urge all of my friends and acquaintances to follow suit,” reads a petition launched by AllOut.org, a leading LGBT digital direct action organization.