I think the yellow star tags you are referring to are connected to a profile when a G2G post includes a link to the profile. A link from the profile back to the G2G post is automatically generated and shows on the profile.
Those could be removed by the G2G posts being edited and the links to the profiles removed. If it was your post you could do it, or if someone else posted you could request they remove the link.
I hope this is helpful :)