Holidaymakers like to spend their time away from work free from worldly cares. Images of extrajudicial killings and blood-soaked bodies lying in the streets can take the fizz right off that poolside mojito.

That doesn’t appear to be a concern for the government of Philippine President Rodrigo Duterte, whose anti-drug war has seen more than 3,000 people killed by police and vigilantes in less than three months.

Visitors who aren’t bringing narcotics into the country have no reason to fear the campaign, Duterte’s tourism minister Wanda Teo told a press briefing last month. Local media seem more concerned about proposals to change the country’s official tourism slogan and plans for staging next year’s Miss Universe beauty pageant.

At first glance, it may seem this confidence is well-placed. Tourist arrivals reached a record 560,872 in July, suggesting little drop-off in visits in the two months since Duterte was elected. Arrivals from South Korea and China, the Philippines’ two biggest markets, rose 20 percent and 23 percent respectively from a year earlier, while numbers from third-placed U.S. were up 15 percent.

Don’t count on that dynamic holding. Holidays are a lagging indicator, typically booked months in advance. Thai visitor arrivals actually increased year-on-year in February 2003, when former Prime Minister Thaksin Shinawatra began his own bloody war on drugs. It was only in May, the same month that Thaksin declared victory in the campaign, that arrivals hit rock bottom — driven in no small part by Asia’s SARS epidemic — falling 50 percent from a year earlier to their lowest level since at least 1997.

Holidaymakers’ tendency to shun regional bloodbaths shouldn’t come as a surprise, because tourist destinations are highly substitutable. In 1995, people wanting to experience coastal resorts, bustling cities and a glimpse of the historic cultures of the eastern Mediterranean spent about 50 percent more money in Egypt than in Turkey, according to World Bank data. Terrorist attacks reversed that pattern: By 2014, Turkey’s tourist receipts were 57 percent higher.

Duterte’s government, and some local tourism operators, appear to hope that the anti-drug campaign will encourage tourists who fear criminality. Evidence suggests otherwise, because holidaymakers are highly sensitive to a country’s public image. A substantial increase in human rights violations deals an even bigger blow to tourism than terrorism or general violence, according to a 2004 paper by London School of Economics and Political Science professor Eric Neumayer, causing visitor numbers to fall 32 percent.

Workers sitting at their desks dreaming of dropping out of the rat race for a few weeks tend to let their thoughts drift to palm-fringed islands and white-sand beaches. They’d like to think of tropical fish darting between coral pinnacles on a snorkeling trip, rather than the specimens Duterte boasts will grow fat on the bodies of drug dealers dumped in Manila Bay.

Even setting aside the tragedy of those slain in Duterte’s anti-drugs campaign, it’s an own goal for the Philippines economy. Tourism receipts between January and July totaled 148.6 billion pesos ($3.1 billion), making the sector a bigger export earner than any merchandise product barring semiconductors.

The Philippines has long trailed Thailand, Malaysia, and Singapore in terms of tourist arrivals, despite a splendid endowment of natural wonders and the highest level of English fluency in East Asia. Now, it’s fighting outright relegation, with former fringe destinations such as Myanmar, Cambodia, and Laos threatening to overtake.

The one bit of good news for Duterte is that visitor arrivals tend to bounce back rapidly after government-sanctioned bloodletting ends, according to Neumayer’s study. The bad news, for both tourist operators and the victims of his crusade, is that he’s vowed to continue the campaign “until the last day of my term.” That isn’t until 2022.

Note: This column does not necessarily reflect the opinion of Bloomberg LP and its owners.

©2016 Bloomberg L.P. This article was written by David Fickling from Bloomberg and was legally licensed through the NewsCred publisher network.

Photo Credit: A photographer captures a stunning sunset while visiting the Philippines. A war on drugs being waged in the country by president Duterte could potentially harm tourism. mendhak / Flickr