The guy's name is Scott Stone, and he served in North Carolina's House of Representatives a few years back -- now, he's an angry old man yelling at his local in-mall PB for standing firm on their by-appointment-only policy, which is super inconvenient to him.

Rep. Stone writes, "Dear @potterybarn (and other retailers) : I am NOT shopping by appointment. You're allowed to be open, so be open." He had another must-hear gripe ... "And why close at 5 when mall is open until 7? Do you actually want to sell anything?"

Pottery Barn's sign here reads, "We're Open 11-5 by Appointment Only! Call 704-442-9493 to schedule! Important Note: We Will Begin Taking Returns on 5/25. We Can't Wait to See You!!" They're in Charlotte's SouthPark mall, which reopened its doors a couple weeks ago.

We tried calling them up for comment ... but the staff there didn't wanna talk. At any rate, Rep. Stone had some follow-up thoughts on the mockery he's receiving, saying ... "Love how lefties are so worked up about my last tweet which highlights the frustrations so many have about how slow NC economy is reopening - slower than most states. Maybe they believe govt should continue to write checks forever and keep the entire economy closed?"