I have about a decade of experience as a hotel night clerk. We had no security personnel. I dealt with unauthorized trespassers nearly every shift. Some are just wretchedly filthy/smelly homeless who want to warm up and mooch coffee, some are thinking of robbing you or guests. Most are career criminals looking to steal anything laying around like a phone, laptop, or anything pawnable.
Some are methheads or alcoholics and crazy in a very dangerous way. I've had my threatened both verbally and physically, been chased around the parking lot, had glass doors shattered. Anyone you don't remember from checking them in is verified as soon as they are noticed on the property, unless they are with someone you know is a guest.
The #1 scam to buy them entrance and time to case the place is to pretend to be busy with a phone call.
Most hotels trespass several people every week or have them arrested, some of them unruly/argumentative guests but mostly criminals, hopefully without the guests noticing.
The Portland Double Tree hosts more black people in one week than most of you have given the time of day in your lives, so it's particularly funny that this bozo tried his stunt there. Such a sad life he must have to stoop so low.