In general, no. However, if you are waving them down for no real reason, and do so repeatedly, you might have some trouble from them. If this is truly an issue, consult an attorney in your area for advice specific to your situation.
In the UK it certainly is.
yes it is illegal, you most likely will be fined for it if you do it in front of a cop.
It is an "assault" and therefore, unlawful.
Not if he has cause to do so.
when a cop can hear it from the inside of his car
haha its illegal to lie to a cop period.
Mabye maybe not
It depends on the circumstances.
Of course, unless the picture is of an illegal nature.
It is slang for a criminal or illegal act such as burglary or robbery.
Yes, it is generally illegal to put signs on cop cars without proper authorization. This can be considered defacement of public property or impersonation of a police officer, both of which are illegal activities.
i dont know buddy ask a cop.