It is possible to perpetrate Do S (Denial of Service) attacks on other users simply by scripting objects that spew screen filling characters from anywhere on the grid to another avatar's user ID, thereby disabling a clear view to the virtual world, but such attacks are now blocked with the use of the "mute" tool.
It is also possible to exploit bugs in the client and server software, which can be used to kick users, crash servers, and revert content; however, such exploits are rare and quickly fixed by Linden Lab.
Second Life has been attacked several times by groups of Residents abusing the creation tools to create objects that harass other users or damage the system.
On April 30, 2007 an open letter, signed by over 3000 Computer hardware and Internet connections capable of smoothly rendering high quality content in other MMOGs may perform poorly in Second Life, resulting in low frame rates and unresponsive controls on even minimal graphical configurations.
The problem is especially prevalent when large numbers of avatars congregate in one area.
Second Life features a built-in digital rights management system that controls the movement of textures, sounds, scripts, and models with the Second Life servers at Linden Lab.
At some point, though, this data must be sent to a user's computer to be displayed or played—an issue fundamental to any system attempting to apply restrictions to digital information.
Some media attention has been given to sexual activity involving avatars with a childlike appearance.