This is going to sound completely barmy as WeChall is a global ranking, but is there any chance of implementing a 'Remove From Ranking' option in the user account panel to remove from the Global Ranking and Country Ranking?
Personally I use WeChall as a way of checking how I'm doing on certain sites, looking to see which ones might need some more of my attention, which ones I am close to completing. Without WeChall I would be signed up to so many sites and totally forget about some of them which I have only visited once or twice.
Ranking for me is not an issue, and you may well say 'Ignore the ranking then...'. Due to my bi-polar disorder it actually causes a bit of a problem as it is something I cannot ignore even if I wanted to.
So I might be alone in this, but I'm putting the idea out there - If challenge sites have 'Remove from ranking' options, examples of which being TBS and my own: Revolution Elite, then why not WeChall too?
Just my two cents.