I have to say so called 'flame wars' have been very rare at photonet. There were one or two posters who were abrasive and a few who were banned. But all considered photonet is an excellant site. I've certainly had very few if any probs at photonet. I've been using photonet for years, it's probably the biggest and best general photo site on the web.
All I would say is be wary of mentioning the word digital here, APUG tends to be an anti-digital site, sadly in many ways it's become a mirror of the digital anti-film sites out there.
On balance though, it's a very good site if you are into film.