Pickpockets know that Palma is a wonderful tourist destination and hence they are always on their toes to hit the target.
Avoid taking public transportation, if possible, but if your plans necessitate taking the bus, keep your belongings in front of you and in your hands at all times. Do not get distracted by decoys (a common technique for thieves). Men make sure the wallet is never in the hip pocket. Not all pickpockets rely only on deception, some will simply snatch the purse of women's hand and run away.
Watch out for scammers, normally young people, well dressed and fluent in English. If anyone offers you a cruise, a hotel upgrade, or something similar offers and that too free of cost, jus ignore and stay away from them. Do not sign anything and do not give them your credit card info. You will be ripped off in a jiffy.
Rain is a common occurrence in Palma de Mallorca, and all of the dry areas along the edges of buildings and under awnings will be occupied almost immediately after the rain starts as it just pours heavily, always carry an umbrella with you; though sometime it may be cumbersome.
When enjoying the Palma activities, events and attractions, carry a drinking water bottle. Dehydration affects people more quickly and severely than most expect.
Make sure that you have an official map of the city and someone who can effectively read maps with you at all times, especially in the older areas of the city, where the streets are often narrow and not in a perfect grid.
Be careful and enjoy your visit to Palma de Mallorca!