"Hey, white person," the poster reads. "Tired of political correctness? Wondering why only white countries have to become 'multicultural'?"

After several more provocative questions, the poster lists a number of different right-wing websites and blogs associated with the alt-right, the loosely organized political movement that has emerged as a powerful force in US conservative politics and that formed a big part of Donald Trump's support. According to the Southern Poverty Law Center, which tracks hate groups, a fundamental value of the alt-right is an embrace of white ethno-nationalism.

Ian Daffern said he saw three posters while walking his son to kindergarten in the morning, in the Woodbine-Lumsden neighbourhood of East York.

"It sickens me. It made me angry," Daffern told BuzzFeed Canada.

Daffern said he was uncertain why his part of town might be the target of such a campaign.

"You can't even say this was your neighbours, because it could have been someone who came in from a different part of town," he said.