I've been here quite awhile, joining in the original incarnation when the LPSG first came about. If I remember right, it was actually a published joke that people took somewhat seriously.
I've noticed a hint of what you talk about. There are probably a lot of factors behind the current atmosphere. First, it just the size of the site's population. You are going to get a few more fools trying it out. Luckily, most of these go away pretty quickly. When your first post is "My mom sucked my dick after she found out I was 14 inches. Is this OK?", it doesn't take long for a few of the regulars to shoo you away.
I also agree with the idea that some of this carries over from what people are experiencing in the real world. Most of the members are from the US. Given the divisions that we are experiencing in our population on significant social issues, the general economic pressure people are under and growing number of people who feel they lack any real power to change their situation, its no surprise that some nastiness carries over to the internet. You can blow off some steam or just be an ass to someone you never have to face. It may not help you get over your actual issues, but it might feel like it for a minute. I'll admit I have been unfair to someone on-line on occasion when I am at the tail end of a really shitty day.
I also believe there are a few other issues coming to bear.
First is one related to the economic problems mentioned above. A lot of men are underemployed or struggling financially. What you will find is that this fact takes a lot of people out of the dating pool. Basically, a lot of these guys are getting no sex and this is their outlet. Men score with women when they feel competent. Unemployment, high debts or low wages really weighs on a lot of guys' egos, maybe even to the point they shut down socially. The sports car is out of the question and they have to make up for it somehow.
Second, I really do think misogynistic sex practices are becoming more main stream. It is is no real stretch to go from "enjoying" a video of a woman get her mouth, face and throat battered by a huge penis attached to a lousy lover to being really belligerent to the other posters on the site.
It is also possible that the whole penis size thing has gotten a bit out of hand. Just compare your e-mail in box to a few years ago. I have several e-mail addresses and I am going to bet that, even with fairly good spam filtering, I get 20 or more penis enlargement e-mails a day. Someone out there is really unhappy about the size of their dick, possibly even to the point that the get cynical and critical toward someone that might have a bit more in that department.
Finally, the combination of cheap digital cameras, "borrowed" photos from the internet and Photoshop is encouraging behavior that leaves a lot of people open to scorn. Nothing like an LPSG pile-on when someone analyzes the shadows of a cock photo or notes that they first saw that picture on Compuserve in 1994. I took my photos down, because it just wasn't worth the trouble of another Shercock Holmes trying to discredit my male member. Besides, someone else is using several of them on Ratearod.com and you can find them there if you wish.
But given all of that, LSPG is still just a fantasy site. It was started on a joke - guys who were so burdened with big cocks that they just needed to talk to someone about it. When someone is clearly just indulging in a fairly mild fetish - let's say pretending to be a woman or adding a few internet inches to their dick - is it really necessary to rip them a new asshole? Have a little fun with it. Maybe someone will return you the favor.
PS - FWIW, I did show LPSG to my girlfriend and she found it pretty fascinating. We skipped the mean stuff, read a few sexy threads together, measured my cock and fucked liked crazy for a bit. I don't think she is joining anytime soon, but that night might have made my membership worth it. :wink: