When I tell my friends I listen to Katatonia...

it was annoying at first, especialy when wearing the t-shirts and people seem to have a dislexic problem with reading a 'C' instead of a 'K'. i found just agreeing, saying yeah, followed by a patronising 'ha' like Barts teacher in the simpsons.
 
Yeah I get that all the time, no-one knows Katatonia in the UK but everyone knows the welsh band Catatonia and people often look at me odly when I wear my Katatonia T-Shirt, until I explain it's not the crappy welsh band. I guess it's something people will always do hear, confuse the two bands, you just have to get used to it!