If there are issues with moderations the best way to handle it is to contact a moderator in private and ask for feedback. In the case of the UK forum @AntS is definitely the way to go.
The response I get for my critical or "not so positive for Samsung" topics/posts and ask for feedback it is usually along those lines:
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Hi Sjors!
No worries, as long it's constructive we will allow it on our community, we can use the feedback to improve 
Kind regards,
<Insert name>
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And yeah, flashing is against the UK guidelines (Not against the ones in my native country though). Usually I tend to avoid that very topic unless it's specefically mentioned. But that's more because of the risks involved with flashing your phone and I prefer to warn people about that.
Besides, if someone upgrades I'm more interested into the parts they do not like about the updates to allow it to be addressed in the future (Samsung is quite receptive about those things)
That said, if you have some issues with the mods you can always send me a message in private if you wish to have some feedback in regard some of your posts.
