“No Soliciting” signs are more of a polite request than a legally binding directive. In residential areas, they primarily serve as a deterrent to unwanted visitors like salespeople and canvassers. While ignoring these signs can sometimes lead to trespassing charges, this depends on local laws and enforcement. The signs carry a bit more weight in commercial settings, and ignoring them can be grounds for a trespassing complaint. However, certain groups, such as political canvassers and religious organizations, might still be allowed to knock due to free speech protections. Always check your local ordinances for specific regulations.