Separate your ships to "main fleet" and raiding fleet/s. Keep your main fleet in the air at all times except when you need to crash someone.
Even when hunting people to crash, keep it on the air. Some people send back probes when you probe them.
eg: Your fleet with a RIP can take about 5 mins to 45 mins round trip if you send it your own DF. Same "planet/moon 0ACS defend" also works.
Never launch your fleet from a planet if your are targeting another planet. Avoid Sensor Phalanx at all cost. Unless of course you are sending from a roamer that you placed NEAR your target.
Others
If you have to use all your fleet, do not attack social people (players who would tell others about your fleet composition).
Do not use your fleet
. FS it to the farthest point possible. You need a reliable moon for this one. Oh, you need a reliable moon on almost all FS. 
If you fleet has already been discovered,
FS from different locations every time. Keep it random and keep them guessing.
Divide your fleet into smaller parts and send them on separate FS missions.
Never go on Vmode.
But then... When you get an automatic ban mistakenly, the system will force your account in Vmode even if you are building something, researching, or have fleets on a mission.
