Public transportation in the Gulf of Thailand varies in terms of safety. Taxis and rideshares are generally reliable and safe to use, though it's advisable to use a reputable company. Buses, trains, and ferries are usually safe as well, though they can sometimes be crowded which may lead to discomfort. It's always recommended to keep an eye on your personal belongings and to avoid traveling late at night if possible. Overall, while high levels of caution aren't necessary, remaining alert and aware of your surroundings is important.