I would assume the disconnects are more likely due to a weak wifi signal or even a defect in your camera, rather than an intruder. But this begs the question of how you have your camera configured for intrusion detection.
1. Do you have your camera positioned so that it would see an intruder before they could unplug the power (possible cause of your disconnects)? If not, you should try to position the camera differently.
2. If so, do you have motion detection configured so that the camera would alert you (with an email, for example) if it noticed motion? If not, you might consider doing this.
3. And if so, do you have a SD card in the camera so it could make a local recording of the motion? If someone is unplugging your camera, they might get to it before it could email an alert to you. If it has an SD card installed, you at least have a chance of getting a recording saved before the camera is unplugged (if that's what is happening).
You can also check the log file to see if the camera has lost power (and you can configure it to email you when it boots up, so you'll know it was restarted for some reason).
I really don't know how an intruder could interrupt the wireless to your camera, so if there is an intruder involved, presumably they are unplugging it and these steps could help you figure that out.
But frankly, plenty of people have reported flaky wireless connections with these cameras. It is much more likely that your camera is just acting up for some reason.