Use his floors as a toilet
From Create Your Own Story
While you're wandering the halls of Squidward's house, you decide that you have to take a dump. Unfortunately, you have forgotten where Squidward's bathroom is. So you pull off your square pants, scream out, "Hallelujah!", and do your business, right there on Old Squiddy's floor. You think you have done something bad, and decide that you feel bad about it. But then you realize you will get over it, and leave. Once outside, you choose to...