Slightly off topic, but my three most alarming experiences of "personal space invasion" occurred in Morocco. DF and I were there in March '10 and in the span of 15 minutes someone came up to me and put snakes around my neck without asking and said "you pay. You pay." Then, some woman came up to me, grabbed my hand in a death grip and proceeded to tattoo my hand (not permanent) and then some random dude came up behind me and smelt my hair. This was on my first trip to visit DF. So, it was only my second time out of the US (I went to Ireland in '05). I thought it was going to be 10 days in London, but he surprised me with short break in Marrakech. So, I was very unprepared for it. I'll have to think of this next time I get aggravated in the grocery store. 
Ha ha - that's Marrakech!
You definitely need to get your game/poker face on there &
keep moving/walking! DH got caught in it the first night we were there with what I call the 'Lo-Lo-Lo' men (they kept singing that, sticking out their tongues & making silly faces & horsing around) with spinning tassel hats & somebody's uncle wanting to take his photo, and then give them money for a photo we didn't even receive! And I got what I term 'guerrilla' henna'd there too - however it was a lovely design, not the dangerous black henna, and I'd been wanting to have one anyway - so I am a bit of a sucker & gave her some money in the end...not that she was going to let it go.
There were a lot of freaky things happened in Morocco as we travelled around, but I loved every minute of that holiday!
When we were at the airport getting ready to leave, I'd become so adept at 'owning my space' I was giving no quarter in the British package holiday scrum (we weren't on one) at the airport check-in counters...using my luggage trolley to maintain leverage in the highly disorganised queue. DH then drew a little cartoon of me - pushing that luggage trolley, while various people & donkeys/donkey carts etc lept out of the way in fear.
Back to your regularly scheduled 'I have lived here for X and I have finally mastered...' thread...
