Make the "i" or "Info" button on a reference field read only

[HenryD]

Hello, ive come across this issue im having where the "info" or "i" button attached to the reference field is not read only, i have the reference field read only but i am able to click on the info button and it shows me users information, is there a way i can make this read only? 

[shyamkumar VK]

Hello Henry,

are your trying to view this variable in SP(service portal) by any chance?

[Brian161]

readonly_clickthrough=true