Any accusations made in a sig towards another user is harassment. The truth behind the accusation is irrelevant. However simply highlighting another's words is totally different. It still may be objectionable if the quote was misrepresented or posted simply for the sake of alarmism.
I am also missing the point as to why wanting to be a policeman is a bad thing. It scares me that such a bigot will ever gain any kind of authority, especially with the discretion we give police, but that point will be lost on anyone seeing the quote who wasn't already familiar with it.
But anyway since Kaendar has no problem with the sig you will probably be able to keep it.
Somewhere, there is something incredible waiting to be confused for aliens.
I can see it now. "Yeah the crooks broke this window over here and came in through it. No, not that one. It's the one in my grow room."