While you do not receive XP for a player kill, PvP adds new challenges to the game as you are battling against a thinking and often unpredictable human. In addition, you may be killed by much higher level players. Fortunately there are some safe zones within Hyboria. These safe zones include:

All zones in Tortage except White Sands Island and Underhalls

Old Tarantia - Aquilonia Main City

Khemi - Stygia Main City

Cimmeria Settlement - Cimmeria Main City
If you are going to participate in PvP then there are a few terms you should become familiar with.