stg83: Thanks a lot for the +1 :), ironically some uncharitable folks might think I'm fishing for +rep even though I was just mentioning what really happened. I tried to ignore it and not let it bother me but it has occurred many times now which is irksome.
Only if you let it matter to you. The rep score is almost completely useless and meaningless overall. The only thing that I know of that it is actually used for, and then only occasionally - is for some game giveaways in the forums the person hosting the giveaway might specify a minimum rep is needed in order to enter. That's usually for reasonably good reasons but the requirements are normally pretty low. You get one rep point per day for posting at least one comment or new post in the forums so your rep score gradually grows naturally. You'll get additional (or lose additional) points from people reacting to your posts in the forums. Generally speaking, if all posts are positive focused they tend to remain neutrual to up-repped, and negative focused messages will be neutral to downrepped. That's just a general rule of course and there are certainly exceptions. It seems sensible though that keeping a positive attitude and communication will always improve one's reputation in general, whether online or in real life. Just put out good energy and don't look back or be concerned about reputation whether it is personal or some number on a website and you'll probably find the rep score just grows over time no matter what.
The only things I've seen on the forums that seem to consistently result in someone being down-repped - whether legitmately or by people abusing the rep system either way - are 1) Excessively negative comments/opinions which include one or more of: blame, criticism, judgment, insults, or demands. or 2) Asking or begging people individually or as a group to get a free game - even in the forums where it is supposed to be acceptable.
So basically if one avoids #1 and #2 above, the rep score will vary up and down over time but mostly up. Once someone has a rep of 20 or so, the anti-spam system seems to relax a bit and not eat posts as much, and most giveaways that specify rep are covered by 20+ with very few requiring 50+ or 100+ so it really is not a big deal. It might also affect whether or not an individual person will trade with someone in the classifieds or similar threads. And if someone doesn't even care about giveaways or trading at all then rep is totally meaningless more or less. ;)