Scammers target newbies because it's very easy to convince them to fall into scams. Because mostly newbies are quite greedy, and they can't control their emotions when they see something where quick-rich or easy-money-making methods are involved. On the other hand, newbies aren't aware of scamming methods here; they don't know how to verify real or fake things.
Scammers don't DM Hero or Legendary because scammers know they are experienced in the forum culture. They know very well how scammers try to scam us. So it's a hard task for scammers and would be a waste of time. They try with newbies, and sometimes they succeed in scamming them as well.
I've received pms as an Sr Member from newbies or random accounts in the past that were obvious scam attempts. Higher ranked users are usually more experienced, but usually such scammers also aim for numbers, the most users they approach, the higher the chances of scamming someone.
I consider this forum quite safe in terms of scammers. Discord for instance is filled with them, apart from some sketchy and shady services that are sometimes advertised, mostly by new accounts, it's quite rare to be approached by a scammer himself.