not anymore (if you are implying physical removal). you can't even apprehend shoplifters anymore without getting sued.
If you only "metaphorically" toss someone onto the pavement, though (tell them to leave the premises), you're fine, and can have the group who has a monopoly on force enforce that request if necessary.
i disagree that its a good thing. The threat of a minor altercation from property owners helps maintain stability (emphasis on minor).
And the state having a monopoly on violence changes the dynamic of property, where the government can take whatever it wants from me (even my children) if they want to dream up a reason.
On the other hand, without the state having a monopoly on violence, anyone has the right to take whatever they want from you, given sufficient force.
Liberty is a two-edged sword, which is something a lot of people seem to have forgotten.