Cybersecurity experts are warning that rejecting calls from unknown numbers may inadvertently increase spam calls. This occurs because spammers can identify active phone numbers through rejection signals, marking them as valid and increasing their targeting. Essentially, blocking unwanted calls confirms to spammers that the number is in use and monitored. Experts advise against actively engaging with spam calls – neither answering nor blocking – and instead suggest utilizing call filtering apps or reporting the numbers to authorities. These methods help to identify and mitigate fraudulent activity without signaling active number status. The practice of ignoring unknown calls, while seemingly protective, can contribute to the proliferation of unwanted contact. Ultimately, a passive approach combined with technological solutions offers a more effective defense against telephone scams.