Alright guys,  I know it really sux to get ganked by higher lev players from the opposite faction while fishing but, you have to realize that this kind of behavoir is going to happen and there's nothing you can do about it.  I myself have been ganked numerous times while trying to fish to build my skill up.  It doesn't bother me much because I knew the consequences of playing on a PVP server.  This goes for anyone, (weather fising or not) if you really have a problem with being ganked by players of the opposite faction, then I suggest you switch realms to a PVE server.  I know it's really frustrating getting ganked by 70's  but this is why Blizzard has PVE servers availble for players who prefer that kind of playing experience.

Hope this helps.

Amen... I play my allys on Fenris (PvE) and my Horde on Malorne (PvP) and take great joy in ganking, as I have been ganked numerous times and am well aware that whenever an ally has the opportunity, they will crush me.
However, I do draw the line at corpse camping, as it goes beyond the "haha I got you" and messes up someone else's gameplay experience.
That said, fishing and mining without panning the camera constantly (you get sick of it) is just asking for it, especially around competitive fishing/mining nodes and areas.