Email crypto spam is the big problem. Only special email address for crypto could solve this problem more or less
This will solve the issue, Bounty hunter should not use there personal email when joining in bounty campaign. Always expect the worst that there details will be exposed in public.
Yes, I totally agree with you, indeed bounty hunters are not allowed to use personal email addresses when participating in bounty campaigns, but not everyone who does this uses a fake email address or changes email addresses, because according to them changing email will be confusing if they forget to save it, then after distribution is complete and have to open the email in the dashboard, because they distribute it via registered email.
This step I did every joining with bounty campaign and airdrop project never give and use my personal email address, only use new email address where not connected with exchange account, social media account and never use email for joining to but to create something most important, I know although our email is hidden maybe still have chance for bounty manager later will show our email to public because they wanna try to promote with their project.