just wonder if a picture size limit could be added...

something that resizes any picture that is over lets sayd 500x600 back down to that size .. just for the threads....

It's possible, but not very practical. Resizing external images could be done with a HTML attribute in the <img /> tag, but browsers often don't use very nice resizing algorithms, so edges might look jagged, etc. Additionally, the entire image is still loaded, so loading time is unaffected on the page.

And things such as on-the-fly resizing and storing a temp version on the 6GC server is unfeasible due to CPU/Memory issues.