If you can’t trust your coworkers to not mess with your lunch, how do you trust them to do important work?
The woman whose lunch I stole laughed it off and gave me back the money. I was ragged on for the entirety of my 5 years there for stealing that lunch.
What you eat should be well protected.
Feel free to downvote, but never play with the safety of your food.
Wait until you hear about the shady stuff that happens in restaurants or supermarkets...