The use of mobile phones is as common as breathing, and while you are away on holiday the easiest way to keep in touch with people back home is posting on Facebook and other social networking sites. Most people use their mobile phones on a daily basis to access the same sites, uploading of pictures, chatting with friends and updating their status so everyone knows where they are and what they are doing, so continuing to do this while on holiday seems normal.
The regular use of your mobile phone and not reading any warning text messages that your mobile company sends out while you are on holiday is a recipe for shocking bills which would probably leave you scratching for money and further in debt than you expected.
The article on The Guardian lists a few things you could do to prevent receiving a killer data bill; including speaking to your mobile provider and checking what their billing procedures are with data roaming. Other ways you could prevent spending tons of money on mobile bills after the summer holiday is to make use of free Wi-Fi areas or purchase a pay as you go sim card in the country so that you pay local rates with a local provider.
Although this is a novel thought with technology being as important as it is, why not just switch the mobile phone off completely, use a digital camera to capture the memories and arrange a BBQ or dinner with your friends and family when you return to tell of your experience and show your photos and other memorabilia off!