No one knows what may happen in the future and what company, school, etc. may use the LU for purposes that would be bad for the school. If some here think we are doing this, just because we can, or to needlessly throw our weight around, you are p...ing in the wind and uniformed of normal, smart, ordinary, business practices. If your brand is not safe, unique, protected, you are just not a good business person. Kinda like going around with no health or car insurance and hoping that no one will hurt you or you won't get sick.
In addition and probably most important, in many cases one cannot just ignore enforcement and at a later date, decide to enforce a judgement that was ruled in their favor. For instance in NC, it used to be and probably still is, that if one ignores a land boundary or occupying a building, that the one occupying the land/building, even if he did not legally own it, can have/use the property as he pleases, due to lack of enforcement of the original boundary or building occupancy.
Always use protection.