At the very least. I could reproduce a close-enough badge that would likely fool everyone except the person who designed the original. I've done this twice successfully (failed once and almost got arrested) to fuck with my friend who runs opsec at mid-sized financial services companies.
One company he worked for had these stupid gates that you needed to scan your badge for (it gives you a green light), but there's no physical barrier. All you needed to do was pretend to scan a badge a couple times and say something like 'ugh stupid things' and the security guard just lets you on through.
Tell us the story
Employee badges often do have RFID, but some places just have you use a sign-in sheet if you're an employee and "forgot" yours (i.e., you don't have one), and sometimes security guards will just let you through if your badge is being "temperamental" (i.e., not working because it's fake).
Most corporate security is security theater (or only marginally useful after a crime) and rules are easily skirt-able because companies don't want to restrict employee access under zero-tolerance policies (which are difficult and time-consuming to enforce).
The company I mentioned previously that will just hand-waive you through a gate with no barriers actually goes as far to fingerprint all their employees and contractors. They also won't hire anyone with even a misdemeanor in their criminal record.
Also note that all of this stuff is markedly easier if you're a woman (less likely to be stereotyped as a criminal) and/or if you wear a suit (depending on the office, a suit can often mean "don't confront me because I'm above your pay grade").
The sad reality is that a lot of these people don't understand, or don't care about the repercussions of openly disclosing this information.
Just today, I overheard someone discussing that they have a significant number of meetings scheduled with a senior member of government over the next few weeks, in a public space.
I don't know if this really happened.
After the Nth time of him being hypocritical and leaving his own machine unlocked when he went out of the room I made a scheduled event that popped up with "update complete, rebooting" and then restarted his machine, set to run randomly once a day between 9-5.
People rarely leave their machines unlocked anymore :)
They're not to be worn outside, and the employee policies state that.
You can argue all you want with your superiors about who it's on while you're being escorted from the building for gross misconduct.
At times I see people with visitor badges on lanyards designed to indicate their security clearance when visiting another department and which are absolutely not meant to be worn off-site.
It might seem pretty benign to the person wearing a green lanyard with a green badge bearing only the word "unescorted", but to those who know, it gives at the very least a security clearance level.
Coupled with their name and department on their usual badge, also being worn, against policy, visibly, in a public space, that information is not only careless but potentially dangerous.