Nostalrius Begins - Quality wow vanilla realm (1.12)

When using LoadIT and viewing the information of an addon in-game, Security: INSECURE is one of the values shown for most of my addons. Can anyone clarify this and what does it mean by insecure? Does it mean the addon might not work well? Or does it mean, like, an account/game/computer vulnerability?

I'm guessing they use global variables/functions and are therefore prone to break if someone hooked the same or overwrote them.

Every addon that is not a default Blizzard_* addon is flagged insecure by the client.
That is normal.
Maybe that version of LoadIT (I'm not using it) is showing the relevant return from GetAddOnInfo().

I repeat this is normal, ALL user made addons are flagged INSECURE, only Blizzard_* (because they are signed by blizzard) are returned as SECURE from the API.
It is not cause for concern.