Sniping

Sniping is the act of getting a long range weapon usually with a optical scope and shooting the player from a concealed position at great distances.

Techniques
Techniques for sniping may include:

Camping - Staying in one hidden location and sniping for a long period of time. This usually works but there may be a few problems, specially if: This can be prevented by changing position after every few kills (many servers warn you after first kill, and kill, then kick and finally ban you after a few more). It is therefore safe, to move after every kill. Many servers (though rare) kill your character for not moving for a certain amount of time (you are counted as moving if you are in passenger seat of a vehicle and the vehicle is moving). So,  Mobile lookout techniques are safer alternatives.
 * One is spotter
 * Server does not allow camping

Scanning - Usually done while camping, the player uses their gun in scoped mode to go back and forth till a name shows up.

Blind Shooting/Blindfire/Hip fire (No Scope) - A player uses this weapon upclose and without the scope to shoot at a enemy.

Mobile Lookout (aerial) - On maps with Pelicans, one player pilots the Pelican, while the other snipes from the back, or (in case of maps like RPG Beta 6.2 in which there is first person view with hand-held weapon on co-pilot's seat) from the Co-Pilot's seat. Additionally, a gunner (where possible) may be there to provide anti-air cover. This is very useful for large and open maps like Coldsnap, RPG Beta 6.2 etc. where cover from both easy sniper targets and fast movers may be needed.

Mobile Lookout (land/sea) - On maps with Warthogs with first person view in side seat (land) or aquatic craft (boat/raft) with first person view in passenger seat, one player drives the vehicle while another snipes from the side/passenger seat. Additionally, a gunner (where possible) may be there. This is of great help where cover from both easy targets and fast movers is needed.

SniperSword - In maps like Coldsnap where the Longsword fighter has a "Support Seat" on either side right behind the pilot's seat and the gunner's seat, upto two players get on these Support seats and the pilot positions the craft such that the target(s) is/are visible from the cockpit, the Support Seat riders can snipe the targets. Though this is very difficult and requires a great deal of teamwork and coordination, the effect is definitely much desired - standard Longsword fire is very easy to detect by mere sight, but by this, the Longsword can eliminate targets stealthily.