you need to get the whole community together to protest against these people and bring it to your communities court

If there isn't a city ordinance that bans this, a lawyer can't really help you.

What you might want to consider doing is getting your neighbors together to attend a city council meeting together. Bring up the issue you are having and see if the city is willing to create an ordinance that addresses it. For example, in the city I live in, residents may only park in the driveway for over 24 hours and there is a limit to how many cars can be parked in the driveway at any given time.

Good luck!

if there is no city law about parking for guests, then you can ask your city councilman to draft such a law. he will probably refuse because it would be impossible to write one in such a way that people would find acceptable. In some dense areas, such as near a University or a business zone, some cities have allowed designated or permit parking, limited to those who live in the neighborhood. You could look into that. The other option is to get all the other affected neighbors together with a plan. For instance, if all the neigbors parked on the street and took up all the space, with not enough space in between for a car, and then let the offending neighbor know that you would continue until he found another option, that might work. Also, keep an eye out for drugs and such. If there is something illegal going on, then even a single inquiry from the cops might convince them to go elsewhere. All that being said, keep in mind that the novelty of the new house might wear off soon and the crowds will thin.