Are you referring to the time it takes to report during a Warzone (presumably while in the spawn area)? If there is another issue causing your removal while reporting, please let us know.
We definitely want people reporting players they suspect are using any kind of cheat. Security is extremely important to us, and while we (obviously) can't go into details about our methods, shutting down any cheaters or hackers (and their methods) is something we take very seriously.
If you really want us to report give us an optimized mechanism. E.g. come up with some hotkeys we can use in WZ that will collect some information, then after the WZ is over we can finish the report.
Example: I think player X is cheating in some way. I target player X and hit the "cheater?" key. At this point, there is a wealth of things BW can do. At the very least, you can remember the toon name so when I fill out the report after WZ.