A lot of importance is placed by the international media, these days, on Greece–especially Athens–being a dangerous destination due to strikes and demonstrations.
It’s true that strikes take place and yes, demonstrations can occasionally turn ugly, but just exercise caution and don’t let it put you off staying in Athens. It's easy to find out what is happening that day and if there are areas (if any) to avoid.
Having said that, you could be wandering around the city centre enjoying yourself, completely oblivious to the fact that down the road people are demonstrating the latest round of austerity measures… Which proves my point that it’s not as pronounced as the international media will have you believe. If in doubt, nip into one of the city's many coffee shops and sit it out–join the locals by relaxing and enjoying a good frappe.
Public transport such as trolleys (electric buses), buses, trains and the Metro are efficient and safe. Just be sure to keep your bag close to you when it's crowded and, as in any major city, be vigilant around rail and bus stations.
Many locals in small villages on the islands still leave their doors unlocked and the only issue–more of a headache really–may come from the party areas in, for example, Malia on Crete or Faliraki on Rhodes. However, a zero tolerance stance has recently been implemented due to the bad image partying tourists gave these places, and they are cleaning up their act.
On a separate note, pavements in Greece have a tendency to be pretty uneven, so watch your step–especially if wearing any type of heel. The same goes for roads–they're pretty potholed, so bear this in mind when hiring a car.
Roads on the islands are very windy, often with no guardrail against a potential drop and having confidence in your driving skills is recommended, especially amongst the stop/start/cut you off traffic in Athens!
By Bex from www.leavingcairo.com