A friend of mine got booted out of the Hilton Hotel at DEF CON after room searches and here is his story and what they were looking for:
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So during Def Con 32, the Hilton Hotel did raids on the rooms of people it thought were hackers. Here is a post of someone's experience and the photos of what the guards were given:
"Before I explain what happened, let me clarify that this was my personal own experience and I'm not talking on behalf of the other people affected by this incident.
There's this hotel that's engaging in random room inspections specifically to Def Con 32 attendees. They're targeting attendees on the grounds of "making sure [we] are not a threat or have devices that can compromise their network security".
In a very aggressive way, they demanded us to open our rooms to go through all of our stuff. We asked them give us time to confirm what they were asking was legit and legal, and they got mad and demanded to open the door or else they were going to call the police and charge us with trespassing.
Things escalated very quickly and armed security guards came with the intention of breaking the door to get us out. Since they wouldn't reason, I decided to just open the door. They aggressively asked for our IDs, started reading some policy out loud, and then escorted us out of the property without a care in the world.
On our way down the hall there were many more security personnel knocking on doors and getting people out, just like a drug raid.
I'm still nervous by this unnecessary and I bet unlawful situation, but I know nothing about laws and how things work in Vegas for visitors. The only thing I can recommend is to STAY AWAY from the Las Vegas Hilton at Resorts World. They are discriminating against Cybersecurity professionals and attendees to the Def Con convention.
I can't do anything else, but to tell you my experience, so you don't go through similar situations.
If you know how to help in any way, legally, awareness, etc, please do.
Cybersecurity professionals must stick together to make things right for the good of everyone. DISCRIMINATION cannot be tolerated."
Other people had their badges confiscated by security, and were hassled and threatened for even walking through the hotel.