Yes you should take pics while they were uloading it, but now its too late
What had to be done is to go out and confront them in any case, and with pissed tone asking wtf is going on, if they say some crap just say to GET THE FUCK OUT! What can they do to you? Kill you? What kind of people do this kind of crap? Shithole rats no matter what race/nationality, so I wouldnt mind talking to them like it as hard I can.
Even if it is not your property on the side walk you should do it anyway IMO.
And police!!! Who the fuck pay them??? We all on taxes! And at your place they are same as here :roll:
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"...free your mind and the body will follow..." - THE MATRIX