Showing when a user purchased Jr VIP especially for recent ones

If possible, there should be some tag for members buying JR VIP recently for the first time. Something like, Jr VIP (followed by new). Will help members to be more careful while dealing with them and prevent cases when a member had purchased Jr VIP to reply to maximum WTB and HAF and scam others.

It just means people will wait longer before posting/scamming. In my opinion, it'd be unfair on new subscribers, as no one would want to trust them for a few months, which would also put people off buying Jr VIP.
Due diligence should be done for ALL members. You don't know who's hacked etc.

Common sense is all you need.