I guess it is if you're oversensitive to everything that might be construed as sexist, through any historical, cultural etc. link. Like some people are oversensitive about bodily functions.
Besides, some groups of people might be put off by such crass analogies. You don't want to exclude those people, do you Ygg2?
Usage of "guys" makes many women feel they don't belong. It perpetuates ideas about programming being a boys club that shouldn't exist.
Poop jokes might make some people uncomfortable, but they're not as harmful as "guys".
Plus, if you read kibwen's comment below that, it's not something that's considered a serious offence, but you will be asked to stop. The same would probably go for excessive poop jokes in IRC or whatever.
(Also, it's an unofficial blog post. Not the same standards. There wouldn't be poop jokes on an official blog post, and there wouldn't be much of a ruckus if someone used "guys" in an unofficial one)
I've also heard people say things like "hey up A" where A is in
["guys and gals", "guys and girls", "everyone", "mothafuckas", "nerds", "friends", "all you", "people", etc.]
Coming form a very formal understanding of language, I can see how it could be taken as a reference to only the men, but coming from my practical experience, "guys" has been used as a gender neutral way of referencing a group without issue.
Now that I think of it, this really is a context sensitive issue. For example, saying "hi guys" to a group of 100 with only one or two women in it might give some listeners the impression that there are no women, thus perpetuating the "boys club" view, whereas saying "hi guys" to an evenly mixed group might not give the listeners that impression.
Language is hard yo.
That's sort of the problem here. We're so used to it that we forget that it might not mean the same thing to others.
What I want is besides the point. It's a club. It has rules. I'm Ok with them.
I usually go with "Hi peeps!" (Yes, I imagine everyone on Rust IRC is a talking marshfellow).
I've also noticed that male genitalia are used to mean something positive (es la polla, tener cojones)
and female genitalia are generally used to be negative (un coñazo, coño)
Anyway, if Rust community did allow such transgressions, people would be up in arms because they are promoting Linus brand of verbal abuse...
It's like they say - you can't please everyone.