How about to add to
https://wiki.waze.com/wiki/User:Moweez/Verbeter_je_vaardigheden#Voetgangers-_en_fietspaden the following rule for L3+ editors.
When a pedestrian boardwalk has a lock level lower then 3 you have 3 options to correct.
A) If you think it is correct that it is there, correct if needed the segment and lock it L3.
B) If it is added longer than 6 months ago and rule A does not apply, just delete it.
C) In all other cases inform the user who added it via PM, HO or Slack why you will delete the segment and then delete it. In the explanation use this link to the
Beginner guide.
The L3 lock is menthioned in the Beginners guide. This way after some time most pedestrians boardwalks will be or deleted or approved by a L3+.