You Know You're a Mature Guild When...

[Vilidius]

...half your raid team is drinking Metamusel for the +stamina.

Add your own!

[Tys]

...your PvP team gets wiped by your grand-children's PvP team. 

[Rumze]

... there is a dedicated forum board for easily chewable food.
Mmmm apple sauce~

Cake is a lie, there is only pie. Through pie, I gain calories.
Through calories, I gain bodyfat. Through bodyfat, I gain weight.
Through weight, my social life is broken.
The Thighmaster shall free me.

[Gith]

... your children cook you dinner and bring it to you at your computer because you are raiding and cannot afford the time afk.

[Chryse]

...there is a designated break time for everyone to go watch Wheel of Fortune.

[Rumze]

Psssh In my day we watched Jeopardy and enjoyed it.

[PinkRose]

...your raid team wears adult diapers and it's not to raid for 12 hours straight.

[Cyrian]

Your computer chair still has the plastic on it.

Murder She Wrote is playing in the background.

[Corsair]

.....Role-aids isn't a way to improve guild RP, it's the tablet everyone is chewing while playing....to keep that burrito from coming back to haunt them....

[Jasyn]

...you catch yourself leaning closer to the screen to read this.

[Corsair]

/peers closely.

Oh.

very funny.     

[RavenMiles]

Instead of stopping in a raid, to heal yourself, You stop to take your pills.

[Althion]

...you have to ask a non-guildie to interpret the text in the general chat channel.

[Vifi Sunfell]

...your first guild leader was William Howard Taft.

...most members were mates at the Second Battle of Ypres.

...everyone in your guild remembers a time when Chuck Norris actually sucked.

...you constantly argue with that one guy who swears gaming got better when Commodore Perry opened up Japan to the West.

...the Guild's favorite blog is Wilford Brimley's "Quaker Oats and Teabagging" 

[Vilidius]

... You got into the pre-launch over 12 hours ago, but after work you had to chair a friggin' board meeting when all you really want is to go earn a lightsabre before it's bedtime.

[Alcuin]

When you're attending a superintendent's composium regarding how the budget crisis in California will affect our schools- and trade-skilling the entire time in a SWTOR window hiding under your webinar and spreadsheets.    

EDIT:  and those "AFK -bio" breaks are happening more often...