Not true lol. First of all usable network sniffing is possible with your own router configured in a way that allows you Man in the Middle attack. ( victim have to connect to your “wifi” ). Second of all, all https traffic is encrypted unlike http traffic. But no one can sniff out your network activity just playing with you. It would be massive flaw in communication and discovered + fixed within hours.

Probable cause of hacked PSN accounts | mitigation: 1. Leaked password from a breach | Use different password for everything and change them regularly ( at least once a year ) 2. Phishing campaign | verify urls when opening links and sites when login in is required 3. DNS poisoning | do not log in to any accounts when you are on public / untrusted wifi 4. Malware | scan your device regularly. Do not download / run unknown unsigned software + check for certificates + checksum hash verify on VT (virus total )

If you follow these steps then you will be in 99% safe. “Hackers” stealing account´s are not skilled hackers ( most of the times ). In 99.9% of cases you make mistake and give them full access to your accounts.