According to , Silicon Valley tech firms are using marketing tactics geared more towards fraternity brothers than programming savants. The problem? Not only is it sexist at times, but it is alienating a large chunk of qualified tech professionals. Here are a few examples:

• Sqoot, a site that offers application programming interfaces, advertised “” for a recent hackathon event, including this not-so-thinly-veiled sexist one: “Women: Need another beer? Let one of our friendly (female) event staff get that for you.”
• Recently, a start-up pitch presentation given to potential investors featured a
• A programmer was quoted as saying he was invited by tech industry recruiters to a party in Malibu “.”
• Klout, a social media analytics company, displayed a poster at a Stanford University career fair that stated: “.”

Of course, this is only a snipet of what’s going on as many of the antics are never publicized. Barbaic events like these may not only cost companies money (several businesses pulled their sponsorship from the Sqoot event), but it.

There’s also an audience that feels left out of the joke. Women made up 21% of all programmers in 2010, down from 24% in 2000, according to the U.S. Bureau of Labor Statistics. Anything that encourages the perception of tech as being male-dominated is likely to contribute to this decline, says Sara Chipps, founder of Girl Develop It, a series of software development workshops. “This brogramming thing would definitely turn off a lot of women from working” at startups, says Chipps.

But is this really a serious problem in Silicon Valley or just young men being young men? I’ve heard both sides of the argument. Some companies that have taken this seriously, such as Etsy, have decided to do something about it. The e-commerce website is in an attempt to lure female coders to New York’s Hacker School this summer.

Whether this is an epidemic that should cause concern or merely programmers acting their age, one thing is for sure — having a working envrionment void of diversity is aiken to siloed idea generation. Silicon Valley should know this.