@CloverDeuceLOL -- I am a PC player and I definitely DON'T do that. And most of the player I see on the Battlefield don't do that as well.
Sometimes you come across a player that does 'wild' movements, but most of the time I'd consider this lag or something else netcode related and not intentional movements initiated by the player. The only benefit sliding around might bring is if you slide around corners where the enemy is expecting you and aims at your head while with sliding your head might be in a different/lower position so she would have to adjust aim and you land some bullets on her before she can do that.