Those of us who've been around a little longer know that we've run out of space a couple of times before (in fact, we did a month or two ago again as well, and lost a number of posts in the process). That's why we limit the the upload to 4 pictures, of 250K in size per message.
We actually want to limit the picture size as well (to something that shows reasonable on most people's monitors, i.e. 800x600 max, but better yet, 640x480). We still have a number of viewers who do not have more real-estate when viewing this forum. When you limit the size to 800x600 or less it's actually quite easy to limit the size of the upload to 250K, without losing any quality at all. Provided you use the right tools, and follow the correct instructions (see here:
http://www.sl113.org/FAQ/items/FAQ-Images.html).
And, yes, as John indicates, it is quote easy to circumvent. But it's really inconsiderate when people do that:
- externally hosted pictures can disappear at any time in the future, outside of our control, rendering posts useless (see some of the old threads on this forum). That's why we don't like it
- externally hosted pictures can be really large, yielding slow download speeds and messed up page layouts for lots of people (although this forum software copes with it much better than the old system).
Sure, if you have a fast Internet link and a big screen, you won't notice... but hundreds of others will be annoyed.
Finally, on the uniqueness of image names... I recommend in the FAQ indicated above to add your username as part of the picture name, That will prevent the problems you find with duplicate names. And no, you cannot link to an existing picture... because if you could, so could everyone else and the current forum software wants to prevent that.
So, even though I could raise the limits, I won't. It's not necessary, just read the above FAQ again.
Peter