"Beware of scammers. Don't blindly believe anyone since not every person is a genuine helper around." and some other precautions to prevent them from such scams.
It will be nice if upon registering it will pop up or something, at least they are already warned.
Also, safety precaution is another warning when PMing someone like what we have already on our forum.
ExistingMessage received by veterans:
!!!WARNING: This user is a newbie. If you are expecting a message from a more veteran member, then this is an imposter!!!New featureNewbie sending a message:
!!!WARNING: You are about to message a veteran member. Beware of scammers: If you are expecting a message from/to a more veteran member, then this is an imposter!!! Do not blindly believe anyone, not all persons are genuine helper.