I've seen an undercover 5.0 in Ottawa before. It was all black, tinted windows, but you could see the lights throught the back window when you were at a stop light.
If they induce a race by revving, then it's entrapment, but in court it would be your word against theirs, who do you think the judge is going to believe?
that sucks! btw this wasn't undercover but in the Ottawa area there is an OPP car that is 07 civic SI. i work at a Honda dealer and seen it there a few times