I work with a plumbing company in Sacramento. In my research over the years, I've found a serial spammer who resurfaces from time to time. Until recently, I was able to report the listings as SPAM. There is a recent barrage of spam in the Local Plus index by a long known Spammer. He operates with a suspended contractor's license as well (https://www2.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=916322).
Here are a number of current spammy listings this guy has published in the index: