Well, you can do 2 things about that. 1# Give negativ feedback back for "trust abuse" or "trust troll".

or

Just remove him from your trust network.
Enter his nick with a ~ here: https://bitcointalk.org/index.php?action=trust

For example
Although I think that the basic idea is good to warn beginners.
However, the way how he and others do, is nothing but spam and abuse of the system.

Personal opinions have no place in the trust system.

Btw, blocking is also available here

But to be honest, i think the trust system is worthless anyway and have no useful purpose.

Back to topic:
Got payed after over 6 Months. Guess that is still good.
But not going to reinvest. There are better systems with less risk.