It would be prefect if these could be on all grids including:
SQL Chart Widgets
Any end-user visiting approval URL (https://portal/ReviewActivity/Approval/RAID) sees active Approve/Reject buttons and can click them getting 'RA has been approved' notice but if he's not reviewer in given RA and he doesn't have permissions to approve/reject, nothing happens. The notice is very confusing.
Non-reviewer user comming to approval page should be informed somehow that he can't vote, e.g. non clickable greyed-out buttons or some notice 'you can't vote'.
Cireson support adviced me to create community feature request describing this situation.