Increased probability that anything I put down or toss on the bed, etc, will fall off and hit the floor instead. In reality, it's probably just a poor sense of propioception.
Just be careful. That only works because your instance already knows about those other instances because someone already interacted with them. If you ever want to join a community on a non-popular instance, you might have to be the first person to search for it by copying and pasting.