It's hard to be negative with someone, especially a noob, when you don't know how much they afford to spend on this insane hobby. Aquascaping get's easier, when you go out and hand pick a couple of coraline covered, interesting shaped pieces for $100. The first time I bough live rock, I suggested that the lfs install a portable cardiac defibrillator next to their cash register.
I think the point of the hobby is for us each to create what we can, within our means, to satisfy ourselves, and no one else. If someone's happy enough with their tank to post a picture, I'd certainly couch any criticism in a coat of "good work" or, "things are coming along nicely."
That being said, I'm a professional carpenter, and I've seen some tank stands that make me instantly close the thread. I've never seen an issue with structural integrity; that's something I'd try to help with. I'm just talking pure, true ugly.