Personal — Illegal encroachment

Dear Sir,
We have shifted to Mansarovar area recently and it is been observed that people here had furnished ramp the floor with tiles of the compound to acquire the government land .
One of the proffessor near us had recently furnished the area outside his main gate seeing the other neighbours acquiring the common land.
As an responsible citizen I need to intimate the thing. I also don't think that the people who all are residing has right to unnecessary acquire the common Nagar Nigam land without any permission.
People had made the square shaped small area called (houzia)outside there houses but they never use it to put water for stary animals. I watched many times people hurting animals if they sit outside their houses.
I really do not understand inside area is there's also on acquiring outside area they become owners of the street land and don't let stray animals sit there. If at all they sit people object saying our kids will get germs and get infected and all.

Need to understand if government allow the owners to use the streets and common area for their sole purpose. May be I am wrong thinking the common land is for everyone common use and for stray animals.
Please correct me if I am wrong.
I urgently need to know for the future sake.

Regards