Since your question specifically mentions complying with knife law, you might want to check out the Florida law quoted below. It's not the general weapon law, but the one that applies specifically to school property. Despite what was told to you verbally by someone at campus security, it may be technically illegal to carry any knife, no matter how small, on a FL college campus. I am not quoting this information because I agree with the law or even think that you should follow it. I just think it is smart to know exactly what the law says so you can make an informed decision about what to carry and how to use what you carry.
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Florida State Law
Section 790.115
(2)(a) A person shall not possess any ...weapon, including a razor blade, box cutter, or knife, ... on the property of any school...
...For the purposes of this section, "school" means any preschool, elementary school, middle school, junior high school, secondary school, vocational school, or postsecondary school, whether public or nonpublic.
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the above quoted from http://pweb.netcom.com/~brlevine/fl.txt
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That's a pretty sweeping law and it matches the law we have in North Carolina.
You may want to consider the possibility that if Campus Security said a 3.5" folder was OK, then they may not be inclined to enforce anything more restrictive than that. However, if they have some other reason to be "interested" in you, they may be more diligent in finding all the ways you are technically in violation of any laws. So while you may be OK opening a care package with your knife, it may be a different matter if you are drunk and fighting or otherwise getting into trouble and then found to be carrying. Or if someone specifically files a complaint about it, either because they don't like knives or even because they have some grudge against you, then you would want to be aware of the letter of the law. In other words, if you choose to carry, then keep your nose clean and be discrete and that includes not being too quick to loan your knife to others.
Also, since you specifically mentioned self-defense, I would add that there are many SD options beyond the knife and many that are actually more effective. A knife has relatively low stopping power. I would much rather have pepper spray than a knife in a SD scenario, and spray does not have as much legal restriction.
**************************************************
Florida State Law
Section 790.115
(2)(a) A person shall not possess any ...weapon, including a razor blade, box cutter, or knife, ... on the property of any school...
...For the purposes of this section, "school" means any preschool, elementary school, middle school, junior high school, secondary school, vocational school, or postsecondary school, whether public or nonpublic.
******************************************************
the above quoted from http://pweb.netcom.com/~brlevine/fl.txt
********************************************************
That's a pretty sweeping law and it matches the law we have in North Carolina.
You may want to consider the possibility that if Campus Security said a 3.5" folder was OK, then they may not be inclined to enforce anything more restrictive than that. However, if they have some other reason to be "interested" in you, they may be more diligent in finding all the ways you are technically in violation of any laws. So while you may be OK opening a care package with your knife, it may be a different matter if you are drunk and fighting or otherwise getting into trouble and then found to be carrying. Or if someone specifically files a complaint about it, either because they don't like knives or even because they have some grudge against you, then you would want to be aware of the letter of the law. In other words, if you choose to carry, then keep your nose clean and be discrete and that includes not being too quick to loan your knife to others.
Also, since you specifically mentioned self-defense, I would add that there are many SD options beyond the knife and many that are actually more effective. A knife has relatively low stopping power. I would much rather have pepper spray than a knife in a SD scenario, and spray does not have as much legal restriction.