Tbh if they're smart enough to create a WG profile, they can also create as many punters profile they like and give them selves feedback.
If service users create multiple profiles (multiple email addresses needed, obviously) and then access more than one account from the same IP address, then AW adds a flag to the account they SPs can see saying multiple profiles or something similar, basically a warning flag on the profile.
So I assume if anyone uses the same IP address for SU and SP accounts, it will be flagged.
This was a while ago, so i assume it is also fairly easy to circumvent using modern methods.