Yes, some people are bound by rules and policy - that is, most people who are doing a job. Don't assume that someone is "simple" because you can't bring your bike wherever you feel like - security guards have a job to do, and shouldn't be expected to potentially risk those jobs in order to make your day a tiny bit easier.

Case in point - in my office building, policy was, in the past, not to allow bikes inside the building. Some idiotically over-entitled people went so far as to berate our security guards about this rule, to the point of belittling them personally. Our security guards are not only generally well-known and liked in the building, they are also people with a job to do - and, as in many publicly accessible buildings, have the added layer of security cameras around the building which will enable their supervisors to discipline them when they're not following the rules exactly.

Solution? I had our office manager speak to the management company and request that bicycles be allowed in the building. That required neither giving our security guards a hard time, or any assumption that they were too stupid to realize that I am entitled to do anything I'd like in the building where I work. Now our building allows bicycles inside - though I generally still lock mine up outside, at the bike racks, like a normal person.

Changing a school policy in Peoria may not be as easy as it was for me to do in my office building in Chicago - but politely asking facilities management will probably go a lot farther than calling someone an a-hole on the internet.