Yes. Two scopes ago, on the way out after checking for Crohns ulcerations (had only one small one, well controlled on 6mp) my GI paused and said "Hey, want to see a diverticulum?" Diverticular disease is pretty common in all people as we get older, Crohns or not, but mine was and remains asymptomatic, as with most people. The only issue is when one gets inftected, which leads to actual diverticulitis and requires rapid interventiion and possibly surgery.