Hi Kandor,
You make perfect sense, I'm English and you're doing better than me.
It's certainly safer to only build links from sites that have PR, but even then the site may be under review, when I bought my 'link farm' sites they had pages in G. I'm sure they weren't banned due to my content, but were probably 'under review' when I got them. Can't remember if they had PR, usually I don't care as long as they have pages indexed in G abd Y.
Hey, nothing in life is totally safe, just gotta do what you can do.
BTW my 'link farm' sites are banned from G but each have over 40,000 pages and 10,000 backlinks in Y.