I know it may be a bit early to start accusing people of hacking but it’s either that or the servers are really that bad. I’ve had several occasions on SWAT where I’ve been shooting at someone and then they disappear behind a wall and it shows them shoot through the wall at my head. Or another case of a person doing a failed 360 (he only managed to turn around) and shoot the ground and it rewards him with the kill. These two incidents I mentioned are 2 of too many incidents where not only me but others have been getting killed in the most ridiculous ways.
Please either check out the issue of people hacking or fix your servers up so me and all the other players don’t end up breaking something out of frustration.