"It's a little intimidating as you walk through the door, but it's good to see students have a voice," he said.
PSLM has targeted prospective first-years in the past. At last year's event, activists interrupted President Neil L. Rudenstine's welcoming address to present him with a "Worst Employer in Boston" certificate.
At this year's address, Rudenstine said, "One of the great things about Harvard is that students can do more or less whatever they want," in response to a question about Friday's protest.
While Lewis said she anticipated some type of action at this year's pre-frosh weekend, she said she was surprised by the protesters' choice.
"We expected it, but not at Byerly Hall," she said.