I think there are multiple sentiments that must be addressed in this thread.
First, obviously, people ignoring and doing your job for you should be looked down upon. However, this heavily depends on HOW you interact with them. If your first reaction to someone stepping into your "workplace" is to robotically shove them outside as their text bubble is loading. There may be a reason you're getting burned out. A person approaching you could potentially be one of the most fruitful RP opportunities you could get, you can discuss what they need and how they could produce it. That's why this "close doors on those tiders lmao" sentiment put me off, assistants are ASSISTANTS. Most departments have GUEST PASS MACHINES. Ya know, this visible burnout from "production" roles may be because you're not interacting and roleplaying, a major part of this game.
Second, people mindlessly taking over your job is a stain on the other player's behavior, not a justification to try and wall yourself in. Again, that's how you burn yourself out, doing the same thing over and over again.
Third, don't interact with security by crying wolf. They don't have a sense of humor.
Fourth, you can do anything as an assistant. You can play at the arcade by yourself and choose who you talk to. It's a great role to familiarize yourself with other jobs that could fit you as well, such as librarian or whatnot. I mean, what's the point and end goal of SS13 jobs? It's to cooperate with one another and try to build something in the face of adversity. Or, in other words, to make a good story and simulation. Why not just "work" as an assistant?