I have just been solicited for a loan of 50k fg. I know loans are not supported by D2jSP. ofc I told him no. Are there further actions I should take? He is 40% warned and I would love for him to be locked or further warned.

you can block their pms - https://forums.d2jsp.org/pm.php?c=14

As I have stated I don't want to just leave this user out there trying to scam other people.

You can check his recent posts / threads and perhaps send a warning to the BnP people. Most loan seekers are gambling there. Some are trying to scam by cashing out immediately but that's a minority.

Just ignore the user or block them as previously suggested. If they requested the loan in a topic or public place please use the Report post button.

No further action is required.