All the guide books, all the web sites, all the locals. They all warn you about pick pockets. We took precautions by not carrying wallets (just a small amount of loose cash in pockets) and by being aware whenever we opened our bags or got our cameras out. By doing this we never encountered, or felt threatened, by pickpockets.
It seems they are opportunistic - if you take steps to avoid being the easiest target in the area then they won't go for you.
Of course, the town was much quieter than we had expected and this makes it much harder for pick pockets to operate. They stick to the main tourist areas where there are large bustling crowds and to public transport points. Apparently it's high risk while boarding trams etc.
Gypsies! No, these people don't only make music..they are good thiefs too!
You'll spot them fairly easily if they want to be seen..If not, sometimes they have this 'great' ambush technique. If you wander off in a little alley that may someitmes seem deserted, suddenly you'll literally see a crowd apear out of nowhere doing there thing. And then..swoosh! Gone is the wallet!
Pick Pockets. Watch out late at night when walking through the city. They are everywhere, and I mean everywhere. Invest in a money belt! I did not use it after my week in Prague because there was no need, but in Prague there is!
Look after your property on trams. I was on a tram during the early rush hour close to namesti Republiky when about six young people, both male and female got on and did the usual encircle operation, pushing and crowding. I immediately realised what was going on and found one of them trying to open my back bag. I never carry anything valuable in my back bag but I got annoyed and started making a lot of fuss. They backed off and left the tram at the next stop. I’m not sure where they were from, but they spoke Spanish (which gives a wide choice).
This practice has been publicised widely. Watch out for it.
Pickpockets and thieves are a big problem. Police did not seem to care about protecting the public or helping visitors, at least not in 1991. Things may be different now, but my cousin almost had her purse ripped off her arm when getting into the passenger side of a rental car she and a friend had. Because she knows Czech and hollered in Czech, they ran off. Her friend had not even seen the incident, they were so fast.
Beware of pickpockets - they usually walk in pairs, one of them well dressed and the other with some kind of sports-wear and snickers. If they spot that you are carrying a bag or wallet of any kind, the well dressed one will approach you and ask some question; meanwhile, his partner will casually bump into you - and ther go all your valuables.
Take the pickpocket warnings really seriously - i was only there for the weekend but had my bag gone through twice. I still don't know how - i wore it close to my body at all times and was looking out for pickpockets!! They are really good!! Luckily i had everything in my money belt and they weren't interested in my disposable camera or guidebook and so i didn't lose anything.
When you'll be in the old town place near the astrological clock beware of the pickpokets because they love crowed places.
I was very careful while in Prague. There are many pickpockets. I have friends who have had stuff taken, including wallets full of credit cards and cash. Be smart and use a money belt!
Prague is notorious for the large number of pickpockets. The city can be quite crowded, especially in the summer months, which makes their job much easier.
Prague is well known with the Pick pockets problem, So just be careful with your valuable stuff and hold your hand bags in a way that you wont make their 'job' easy...
Be careful of the prostitutes around Wenceslas Square. Normally they will leave you alone, but if they do approach you away because they will take the opportunity to pick your pockets.