Accreditation just acts as another "has a college degree" filter. There is already a proliferation of certifications that people can attain if they wish, that may or may not help them in specific instances that try to "give you a minimum level of knowledge", but really that just means the questions you get asked assume you know that - ie they are harder and incorporate your algorithm knowledge, instead of specifically saying "code bubble sort". I don't think that's any better to be honest.