The National Park Service may crack down Monday on "sleeping activity" at two Occupy DC camps. A protester says, "If we can't sleep here, that does not end the movement" Washington (CNN) -- The National Park Service plans to crack down Monday on what it calls "sleeping activity" at two longstanding camps established by Occupy DC demonstrators in the nation's capital. The service notified protesters on Friday that they "may be subject to arrest and their property subject to seizure as evidence" if there are evident "camping violations" by around noon Monday. The demonstrators say they will defend their sites. "Participants of Occupy DC at McPherson Square, both sleeping members and non-sleeping members, will defend the public space we have used as our center for activism on this Monday, January 30th," the group's website said. Occupy DC will peacefully resist this politically motivated attempt to suppress the free speech of the disenfranchised 99%. On Sunday, a small group of protesters met for about three hours under the statue of Civil War hero Maj. Gen. James McPherson, which is in the middle of the park, to discuss how to respond. Oakland mayor: Fed up with some Occupy activists Also Sunday, video posted online showed a man appearing to walk away from U.S. Park Police members as he yelled out, "I have done nothing wrong." Two officers tried to grab him, before a third officer used a stun gun on the man, who was then handcuffed. A CNN crew witnessed the arrest, which protesters said came after the man went from tent to tent removing notices posted by the park service. Rich Coffman, a Dallas resident who has been camping in the Washington park for three weeks, said demonstrators from Nashville and New York are expected to come Monday to show solidarity with the capital demonstrators. Until now, the camps have been allowed to continue in Washington under a Park Service interpretation that considered the activity a "24-hour vigil." "Mr. Jarvis is completely out of line," said Issa. It is not his job to interpret the Constitution, over law. Issa, who last month wrote a letter to U.S. Interior Secretary Ken Salazar citing damage to part of a $400,000 renovation of McPherson Square, continued his criticism at a House hearing last week and came away unsatisfied with Park Service answers. CNN's Ed Payne, Athena Jones, Courtney Battle and Paul Courson contributed to this report.