It is a pretty important aspect of Latter Day Saint theology. They still do it but officially you can only baptize your own family members with the permission of surviving family members. These guidelines are not always followed. Additionally they have said they removed people from their rosters that were improperly baptized but the members I have talked with are skeptical and found it a bit laughable that the church removing a name from a database would somehow undo a sacred ritual.

I mean I’d see that as an invitation to help myself to anything the church owns that isn’t nailed down.