May be do it like cod prestige system: You reach leggy >> you can make yourself newbie again >> you get this badge that represents you have reached leggy once >> you reach leggy again >> you get this second badge to represent you have reached leggy twice — these badges must look prestigious and must show their significance.
It takes a while to get to leggy even if you are exceptional in earning merits due to activity required so user should be able to get only handful of prestigious badges in one's lifetime which will make badges prestigious by itself.
Well, being a newbie often comes with some restrictions, not having to send PMs to ranked users, having a default posting time where, you don’t get to make several posts in minutes, not having to post pictures, no signature space, no avatar space and more.
Would these be the case of those that are able to revert if this was possible?
If it is the case, a lot of people wouldn’t want to be a newbie no more and there is no being a newbie without these and that makes the idea not so ideal.