Boots make for a great wall, protecting the owner from the results of all kinds of mishaps. Stepping into mud, water, snow or even worse becomes way less an ordeal if one wears heavy boots. Some boots are even more protective, providing steel caps to protect toes from heavy drops, and deeply carved soles to give a strong grip on all surfaces.
Limit #18 It's In The Eye of The Beholder
As much as boots protect their owner, they raise bad feelings in other people. Boots are usually part of uniforms and as such boots have been involved in lots of cruelties. This way boots can build walls by just their very existence, when people judge the owner by sight.