Supposedly, glitchers have been a wide spread problem over MGO and many people stopped playing online because of it. Whatever the case, this was apparently big enough of a problem for Konami themselves to take action against it. They contacted many players saying that the problem has been dealt with:
Konami has a firm policy regarding cheating in Metal Gear Online. It will not be tolerated. In keeping with this position, we have taken action against 113 accounts participating in prohibited behavior.
The role of the gaming community in keeping Metal Gear Online free of this type of activity cannot be overstated. You are the first line of defense. We encourage you to report instances of prohibited behavior and ask that you provide any evidence you may have regarding these events.
Violations can be reported to us at: email@example.com
All reports will be reviewed; necessary and appropriate actions to address the issue will be taken immediately. Due to privacy concerns, we will not be able to notify you of our findings, nor of the actions taken to resolve the reported violation.
We wish to thank you for your continued support of Metal Gear Online.
While they don’t say exactly what they’re doing to the cheaters that are caught, I doubt it’ll be something light.