First and foremost, its against the forum rules to air allegations against specific players. There's a report abuse function for this!
On the question of this behaviour being consistent, that's simply because its not difficult to create new accounts to engage in this form of scamming. Jagex certainly bans many accounts all the time.
Although I appreciate that you were trying to alert and educate the community, posting a thread, in which you acuse others of in-game misconduct, is not welcome. For this reason, the thread is now closed and the opening post removed.
The best thing to do is to report the players, soon after the incident in-game. In doing so, your report will flag the area and accounts for investigation. For more information, please read the
Report a player
page of the Support Centre.