If I want to waste my time trying to get a random drop from nothing enemies I'll go farm that new loot cave, I don't do that because it would be boring and pointless, just like wasting my time in strikes killing enemies that don't need to be killed. If they're right in front of me and in my way (if I'm not on my sparrow speeding to an objective) I kill them because why not, but going out of your way to kill low level mooks is idiotic, these strikes take long enough as it is and there's no call whatsoever to drag them out hoping for a handout that's not even likely to happen. I got most of my legendaries and exotics either by purchasing them from the factions, completing the weeklies and dailies, or in the Raid, and you don't get any of that done if you waste all your time killing trash. If you want legendaries and exotics, do bounties and save up all your marks each week (and work on Rep with the factions if you haven't already). And if you haven't already made three characters you should, all the limits on activities will hold you back otherwise, and doing the weeklies and the raid on three characters per week makes all the difference trying to get stuff quickly. And if you make duplicate characters that are all the same class then you can gear swap between them and save yourself the time and bother of needing to get high level on a new character from scratch, just get to level 20 and instantly go up to whatever light level your first character is just by swapping your gear, I just got my third Warlock to level 20 last night and within an hour I was running the Raid with him and got Aetheon's Epilogue (my gear gets whichever character I'm using to 29, I can even solo the weeklies without much trouble, though with the Nightfall that's mainly because I can res myself if I go down... There's a reason I made three Warlocks, Fireborn ftw).