yeah, sometimes lag makes u look like hacking.
When you lag, you're moving on your screen, but jamming on other ones, so when ur wifi is up again for a second, and let's say u moved from point A to point B before it was up again, the players will see you move in a ridiculously fast speed.
I live in a country that has bad wifi, overall, and once, my friend was shooting a spar video; I remember laughing so hard after seeing myself move that fast, thinking it was an error with the program he used for video taping instead of my wifi
.
Also remember that the server isn't always on your side; you could be lagging from your own wifi, and getting extra lag from the server itself.
Now, how do you avoid this? I have some answers: Always try being close to your modem, while playing at your house/relative's/friend's house, and when you wanna play at public places, use your Mobile Network subscription. If you can't use mobile networking/don't have it, then just don't play outside of a house; public wifis are HORRIBLE.
And btw, aren't there like commands for admins to check if a guy is speed hacking? Anyways, that ain't any of my business.