How do you know if you have been banned?

I used instant relaod for NM last night and after that I could not join any co-op games anymore.  hw do you know if you have been banned?

If you have two computers, you can try to have a legit character and your hacked character both try to join a private match. If one of them is banned, then they will both join the same private match name, but won't be able to see each other or play with each other.

Now if both are legit or both are banned, they CAN play with each other. Banned players can only play with other banned players.

I never got banned for using instant reload on all my alt accounts :P
 

And you dont need 2nd computer,  another browser is enough
 

Actually if you play on Kongregate, you only need one browser. When you log in with another account, it may disconnect the first account from kong chat, but you can still join private matches together 

I do it all the time xD
 

Yes, multiple tabs will work as well.

any other easier ways to do it if ur too lazy to use multiple accounts?

You could use same account, but join private match with different characters on that account :D