I think paid advertisements in the marketplace should be locked if commentary isn't wanted, that's the purpose of a lock - let people read but not write. Member postings of course shouldn't be locked. I can understand not wanting commentary on a paid ad, but you can't just delete negative comments and let positive comments be, that's going to ruffle more than a few feathers.

2001 Prius Photos       2005 Prius Photos
1992 Mitsubishi Delica Diesel-WVO Hybrid Photos