Looking on the internet deeply has found these results:

there should be security guards is the most popular phrase on the web.

There should be some security guards 14 results on the web	there should be security guards 12,860 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
That security guard, over there. There was a struggle between the Latvians and the security guards. You said there was a new security guard. As you know, there were two security guards in the parking garage. There were these... security guards. A Chinese male robber is holding a hostage on Duddell Street against some security guards. There's no dude who can feed a video loop to make some security guard think all is hunky dory, while burglars in cat suits rappel from the ceiling. And these are some of the actual security guards there.	Didn't I say there would be security guards? Maybe they need a security guard. A security guard screaming something about a monster. So the security guard found it parked here. The first Security Guard was attacked here. The security guard was killed inside. But the security guard let us in. Somebody killed a security guard last night.

There should be some security guards

14 results on the web

there should be security guards

12,860 results on the web

More popular!

That security guard, over there.
There was a struggle between the Latvians and the security guards.
You said there was a new security guard.
As you know, there were two security guards in the parking garage.
There were these... security guards.
A Chinese male robber is holding a hostage on Duddell Street against some security guards.
There's no dude who can feed a video loop to make some security guard think all is hunky dory, while burglars in cat suits rappel from the ceiling.
And these are some of the actual security guards there.