Ok now am getting a clear understanding about it, why am asking this is due to my activities of Bounties Campaign back then it's really Much few members was kind of mocking me that I have some many activities to be a full member but am still on member rank which is due to all those post of bounty reports I have submitted on those past bounties thread. I just want to clear it up, so my account will look much better.
I can understand your feelings. You can delete your previous posts but you will likely lose much activity here. The number of posts itself isn't important and can be recovered which isn't the case for activity (if you care about it ofc).
I can give you a solution, check this spreadsheet
https://docs.google.com/spreadsheets/d/12saLhlUoqIdairxzuSPu6EYGrt7FN2lOstO1yDjCEbA/htmlview, find the duration of each period, then go to your previous posts and delete whatever post you like but you should keep at least 1 post per period to avoid losing the 14 activity for that period. Just keep in mind that the more post you have per period, the safer it be. Since that 1 post you kept can be deleted at any moment and you will lose your activity.
You can also edit your posts in bounties, change the text or remove a part and
put it like this...
Everyone has a bad start somewhere in the net including legendary and staff. Digging too far in the past is pathetic imo. Good luck