Nevermind, found the answer to thread title. 

However, I did have a question about linking accounts.

I just subscribed to patreon for BF4DB (and suggest all you do as well), and this allows the subscriber to see "linked accounts".

The player I wanted to look up though had maybe 25 "linked accounts" listed under the admin tab, and it seems unlikely all of these are actually him. 

Several of those "linked accounts" were banned, but I don't have any further info beyond what I see on the page so I don't know if these are valid links or not. 

I don't want to make 20 unfounded reports, so I wanted to ask first. 

Are the "linked accounts" under the admin tab on bf4db grounds for a ban? 

It depends, they might be using a vpn or proxy. if you can determine if two or more of accounts have played at the same time it's safe to say it's probably not a residential IP address. Either way it's up to you to ban based off the IP link. I know I've banned non-residential addresses because of repeated abuse from the same IP, better safe than sorry in my opinion. Either way, if the IP is shown in the linked accounts tab you can use https://iphub.info/ to check if it's a residential address. Keep in mind it's not 100% accurate.