sniping

from The Collaborative International Dictionary of English v.0.48

Snipe \Snipe\, v. i. [imp. & p. p. {Sniped}; p. pr. & vb. n.
   {Sniping}.]
   1. To shoot or hunt snipe.
      [Webster 1913 Suppl.]

   2. To shoot at detached men of an enemy's forces at long
      range, esp. when not in action; -- often with at.
      [Webster 1913 Suppl.]

   {snipe at}, to aim petty or snide criticisms at (a person) in
      his absence.
      [PJC]