Keeping a forum is no easy task, i know because I hosted a forum of RC here in costa rica, and there were like 250 members, now I don't immagine how hard it is to host a forum like this one, with thousands of members (maybe not all active but still) and newbies that often post questions just because they don't use the search button, or pretend to do business like if this was ebay.
My personal suggestion to you FroyoShark is to take it easy, and back off a little and try it all over again.
This forum seemed harsh to me to when I posted my first thread but then I soon realized that people here are quite friendly and sometimes they are just trying to keep the forum to a certain level of professionalism.
What I would do in your shoes? Well first edit your signature... stop adverstising lasers for sale you don't have in your signature and then complaining because you have a hard time with other members.
Second, learn, help other users, read the forum rules and stickies, most of them are very usefull for all newcomers.
If you want to sell your lasers head out to ebay, try your luck there, and with time you will probably be able to sell them here also without any problems, but don't pretend to have people buy from you just because you put out an add...
I still haven't built my first laser, but from some lasers I have bought I know I could easily do it, will I be selling lasers in the forums.... No, very not likely, there are too many people doing it and as many have stated, they already have a reputation. Also please do the math, it's no big deal to build and sell lasers, many times you end up selling them and your gain is $10-20 over your cost... now this isn't going to make you enough money to support this hobby unless you sell 10 a month.
If you want a hobby that will give you some money back I suggest you look into metal detecting, once you have invested in a detector, all you find will give you money, and i have seen a lot of people making thousands of $$$ with that hobby.
I myself found a diamond ring that even if small was quite a nice find...
So take advise from another newbie that is starting to love this forum, and relax, edit your signature, and have a good time like most are....