As much as I love the hate mail that comes in when I decide to play with the UCAV. Let me offer you some tips to avoid being my next victim.
1. When you get killed on a roof, don't go back to the exact same spot and not expect it to happen again and again.
2. Play a different class, this will most likely get you moving around on the map and make you less of a target.
3. Don't group up. As much as I love the multi kills, avoid being in a group on a roof, I will always go for the group on the roof rather than the lone wolf on the same roof (not to say you won't be next)
4. If you find that your partner on the same roof your on has turned into a pink mist in a large explosion, jump, it's your best bet for living longer and getting you playing the objective. If your not on a roof I have no reason to UCAV lol.
5. No roof is safe, despite what you may think their is no roof that is safe from my UCAV. If I want you I will get you no matter the roof. ( when all else fails SUAV always works.
6. Final tip PTFO, if your playing the objective then there is no reason to UCAV. But the moment you decide it's a good idea to hide on a roof thinking your safe guess again... death from above is coming for you.
And these are my tips for those who hate UCAV users but I do encourage the hate mail it just means I'm doing something right and make the game that much better... for me anyways lol.