I think there are some bad definitions here. Well intentioned, perhaps, but over the line in terms of squelching opinion.

The trolling definition is the most obvious. If a picture is 'ugly', to someone that is an opinion and it is as valid as 'a picture is pretty.'  Less kind and gentlemanly, but still an opinion. I feel an admin is welcome to pull such an opinion -It's Rendo's Forum, it is representative of their company and the company attitude,  and, for lack of a better way to word it I don't mind playing to their style - but to put it in someone's record as a black mark may be at best questionable, especially since any record Renderosity keeps may be handed over to someone for legal purposes. 

I didn't see a mechanism in the TOS that allows a member to review his or her record and add their side of the story if Renderosity has in fact put black marks or adverse comments in a member's record. Just think if someone at Rendo recorded in detail the horrible things someone was doing online,  but then erroneously mis-entered it into another members record, for example.  As Renderosity indicated, such a record is a legal document if it can be handed over to someone who asks for it from outside the company.

The Google defintion of Trolling is better than Rendo's, and I think is best left without an example:

troll2

trōl/

verb

gerund or present participle: trolling

1. 1.

informal

make a deliberately offensive or provocative online posting with the aim of upsetting someone or eliciting an angry response from them.

 

2. 2.

fish by trailing a baited line along behind a boat.

"we trolled for mackerel"