or if you get targeted by a recon drone while a helicopter of any kind is out it will know your postion and shoot you

That's funny because the other day I started wondering. Iv picked up guys on my portable reader using assassin/assiassan pro. As well when I'm using assassin iv been picked up on enemy raders as well

Only the pro version of assassin removes the red name from above your character. Also a known blind eye glitch was patched relating to when it was earned as a specialist point streak. (see News for details) Also killcams don't always reflect exactly what the enemy saw; they show you on a HB sensor and they never show smoke,so no worries there. But sometimes strange things happen in MP due to the internet butchering data. Shrug it off and keep playing, and there's nothing wrong with using stealth classes.