Unlimited Claymore

1. Plant a claymore
2. Hack some enemy equipment
3. Die
4. Plant claymore

Rinse, lather, and repeat as many times as you want. Basically, when you die your equipment disappears, but if you've hacked enemy equipment the game sees that equipment as "your" equipment and ignores the actual equipment that you planted.

Interesting, this could be of some use if I only had the time to actually go for Hacker Pro >=(