Yes, it is very important for Telegram to allow users to disable stranger PMs. This is because scammers have been known to use the platform to contact unsuspecting users and try to scam them out of their money or personal information. Telegram has already warned users about this in their pinned message, but it is important to take extra precautions. Allowing users to disable stranger PMs would give them more control over who can contact them and help to protect them from scammers. Additionally, it could also help to reduce the amount of spam messages that users receive, as it would prevent people from sending unsolicited messages. By implementing this feature, Telegram could help to protect its users and create a more secure and enjoyable experience overall.