Advocacy groups can have a positive influence on the legislative process by using various tactics. Such tactics may include polls, lobbying or publicity stunts to persuade public opinion in favor of a particular goal. With such measures driven by various motives, such as political, commercial or moral motives, they can successfully influence positive outcomes in legislation.
Advocacy groups do have a positive influence on the legislative process. Advocacy help defend the rights of certain people and therefore have a positive influence on the legislative process. Advocacy groups help shape the legislative process by encouraging legislators to act a certain way and to produce positive legislation that is favorable for the general public.
I believe that overall advocacy groups are only going to push for their own interests and nobody else, when passing legislation you should always be considering all sides of the issue that you legislating about but if the advocacy group has it's way then they will try to shut out the other side which overall has a negative influence on the process.
Advocacy groups are terrible for our society. They cause corruption in government because only those with a lot of money get their ideals to get through legislative process. And those with out enough money don't even worry about it because they are losing very little due to the corruption but those gaining from it keep it going because they get large gains.