@Bobbindale
I've pretended not to speak English before.. also once started a fake but loud argument with OH to frighten one off coming near!
I have pretended to be someone who can't speak English too.
Literally said 'beklager Norsk, ingen Engelsk ' (Sorry Norwegian, no English.)
The clown said 'oh, you're foreign where are you from?' 'Ummm I just said No English you dummy!' 
@Newcatmum
A few months ago I was walking through the shopping centre talking to my daughter and had one saying "excuse me". I ignored and continued my conversation and she kept shouting "EXCUSE ME" in a really rude tone.
ARGH! How annoying.
That annoys me so much. I have lost count of the amount of times I have been walking along chatting with DH, (or DC or a friend;) and a chugger, or a salesperson, cuts me RIGHT OFF in the middle of a conversation with their sales spiel! Incredibly fucking rude. 
A similar thing happens in a certain fast food chain sometimes. I am sitting with my DC/friend/DH eating the food we just paid for, and chatting quietly, and the Lobby Woman interrupts us, trying to flog raffle tickets, and says very loudly 'HI FOLKS. WOULD YOU LIKE TO BUY SOME RAFFLE TICKETS? You can win a telly, or a stereo, or a tumble dryer,' blah blah, blah......'
Umm I am EATING my food, and talking to my friend/family member. Bog off.
PLUS, I have it on good authority from someone who used to work there, that the top 3 raffle prizes (that cost somewhere in the region of £300, £200, and £150,) go to one of the managers or supervisors, or one their family They totally fix it. As a general member of the public, you have VERY little chance of winning a main/major prize. Probably no chance in most cases.