https://www.merriam-webster.com/grammar/fewer-vs-less

Essentially, fewer is normally used for discrete numbers of things (e.g. “fewer apples”, “fewer boats”, or “fewer cops”) while less is used for amounts (e.g. “less water”, “less sand”, or “less money”).

As noted in the above link, there are exceptions. However, the exceptions listed are all with “than” or “or” added. Specifically, it’s pointing put that while “fewer items” is correct, “3 items or less” is also considered correct.

In the case of the sign, it is referring to the specific number of officers in the city, so it should use “fewer”. Does it matter? No, not really. Why did I bother saying anything? I got a chance to rep grammar and quote Stannis Baratheon at the same time.

Fewer.

I thought my cat was strange for this same behavior. I should have known he wasn’t the only one. He will borrow under the blanket himself if I don’t have an entrance for him. Or paw at my leg until I make him one.

Making friends on sites like this can sometimes yield invites. There are also usually communities specifically dedicated to giving out invites. And if all else fails, some trackers have open invitations (either time-limited or with some kind of interview).

A common method is to get your feet wet with an easier to get into private tracker and use the invitation threads in it to get into the ones you want.

The organization and typical submission requirements are what really put them over public trackers for me.

Public tracker: It’s this big and this many files. Figure it out.*
Private tracker: All the metadata

* Experience may vary. Post is overly dramatic for comedic effect