Parking issues with neighbours

Hi I'm from Bangalore. I reside in a 50x40 corner house, meaning our house is a corner site. Our neighbors have all constructed 3-4 storey buildings on small 20x30 plots. This was creating a huge problem for us because these guys never had any place to park apart from the front of our house. However we got the problem solved by giving repeated police complaints. Now we have another situation where, one of the neighbor has purchased like 5 cars and his tenant has a car. So totally 6 cars. He has purchased these cars for providing pickup drop services to bpo's and hence make money out of it. Now the problem is this guy parks his cars on the side of my house which is on the main road. Although we don't use that side what it is happening because of this is people sleep on the foot path and sometimes even drink or smoke and even pee on my walls because of this. The cars create some kind of a covering for these activities to take place. My question is, is it right for us to take up the matter to the police and raise objection regarding parking. Cause this is a genuine problem for us hence I just wanted to get advice on the same. Thanks.