This update refers to this post:
https://logotournament.com/forum/designer-resolutions/24788that shows an big error in my opinion as it means that you can search thru comments and find a comment that gives you a reason to react...
-like font styles? (fonts are a major part of a design) - if a ch ask for you to change the font to a calligraphic style - you should ask him if there is a submitted design????
- colors / objects/ styles/ placement/ etc.....
my initial suggestions was to make comments hidden on blind phase, and open on top 5 phase - that way you can take action while the contest it's still open against CH or designer
but...after you think of the full problem...things i think it's kind of messy, it's font's, styles, placement, etc....
i think the blind phase it's causing it.... if you can't ask the CH to be careful on copyrights designers will for sure be careful