Smegheads
Reading one of the below has just reminded me...

Turning up to a "home clothes" day in the 5th year sporting jeans and a Red Dwarf T-shirt. It wasn't so much the choice of show that spurred the teachers into demanding I cover it up, more the quotation on the front:

Space Corps Directive #34124
No officer with false teeth should attempt oral sex in zero gravity

Apparently this is not what respectable young ladies should be wearing.
(Kitimariana, Tue 3 Feb 2009, 16:31, 10 replies)

Got sent home from school once
My t-shirt said: Jesus is a Cunt

In big red script.

Bad idea, that was... bad idea...
( SpankyHanky, Tue 3 Feb 2009, 16:35, closed)

Haha!
I like it.

Reminds me, I managed something similar myself: one Comic Relief day, we were allowed to come in dressed as we pleased, or in costume. So, with a little help from my sister, I went in as a goth/emo type. (My sister did my makeup)

The highlight for me was one of the chav-type girls asking "So...do you dress like that normally?"
I wanted to say yes, but I don't think she'd have appreciated the irony.

The best bit was that I managed to go the whole day without anybody complaining about my T-shirt: ever seen those Nirvana T-shirts with the back that reads "Crack Smoking Fudge Packing Kitty Petting Mother Fucker"?

Not a single teacher batted an eyelid.
(LongJohnBaldry, Tue 3 Feb 2009, 16:38, closed)

As a bit of Nirvana pedantry, it was "Satan Worshipping"
"Kitty Petting" was the other one, the one that said "Corporate Rock Whores" at the bottom
( emvee cruor deo cruoris, Wed 4 Feb 2009, 9:54, closed)

inappropriate slogans
I once got sent home from my sixth form college for wearing a t-shirt depicting a formaldehyde cow and the slogan "arty-farty". Apparently, our head master considered it to be inappropriate for the younger pupils of the school.
(etak, Tue 3 Feb 2009, 17:08, closed)

Ooh, a couple for me...
I bought my friend a t-shirt saying "I don't have tourettes, you really are a cunt", the irony being that he does have tourettes. Both sent home from college for that.

I borrowed a mates t-shirt - www.tshirthell.com/shirts/products/a192/a192_bm.gif

And a custom one my friend made me - static.rateyourmusic.com/album_images/14392.jpg

Yet my friend Mary got away with this -http://www.tshirthell.com/shirts/products/a429/a429_bm.gif
It's double standards I tells ya!
( Agnostic Antichrist Baltimora, Tue 3 Feb 2009, 17:14, closed)

Moo
My Inspiral Carpets "Cool as Fuck" t-shirt caused equal consternation among the teaching staff at school.

I don't see why, it was cool as fuck after all.
( Moey, Tue 3 Feb 2009, 17:14, closed)

Hehe
I got kicked out of a McDonalds once for wearing a t-shirt that said 'McShit' on it.

Ooh I also got asked to leave a Tescos for wearing a 'No, I don't have a fucking club card' t-shirt. God I am such a rebel.
(powervator and NONE SHALL PASS, Tue 3 Feb 2009, 17:14, closed)

Not alone
It's nice to know that I wasn't the only one who engaged in a little bit of T-shirt rebellion.

/airpunch

Mind you, it beat the dress down day I had in the first year, where 99% of the year turned up in brightly coloured shell suits. I had an AC/DC number on that day, and dearly wished for a cigarette lighter to spark up amongst all that man made fibre... WHOOMPH.
(Kitimariana, Tue 3 Feb 2009, 17:22, closed)

Mmmm
Melty
(Potty Jag har smör i min rumpspringa, Tue 3 Feb 2009, 17:29, closed)

For me it was the classic PWEI Pepsi logo T-shirt
With "Sample it, loop it, fuck it and eat it" written around the outside. In my defence, it had a "*" over the "u" in "fuck".
( emvee cruor deo cruoris, Wed 4 Feb 2009, 9:56, closed)