Hey
,
If someone spams your topics, simply use the report button and move on:

I would not recommend replying to these posts, as your replies would also be considered to be spam. Additionally, if any users harass you via PM, you can always block them.
Lastly, if the spamming continues or escalates, you can always gather all of the evidence and PM it to a staff member, overseeing that forum:
https://forums.d2jsp.org/staff.php?g=25.
Hope this helps.