Probably the same as with Trust feedback? Either never removed or only if used to spam the same user with the same feedback. Korner is a nobody so it's not like his feedback/flags matter at all anyway.
There is a time limit before you can create another flag for the same user, so that kind of spam won't exist with flags... I guess korner is gonna have to slow down at 98 (current activity).
- Per 180 days, you can only give 1 flag of each type to a given user. So you can't give someone multiple written-contract-violation flags in 180 days, for example.
- Globally, per year you can only create 1 flag per activity point you have, but at least 1/year.