No matter what, the ops are always right. Well not right, but what they say goes. You can be kicked and banned from a channel for any reason. But generally the things to avoid are things like:
talking in ALL CAPS
talking LiKe ThIs
or l1k3 t41s
or £ïkë thï§
never flood (sending a lot of messages to the channel one after another)
never repeat (saying the same thing over and over again)
never use tons of color codes or annoying colors (neon green text on a yellow background is especially bad)
Don't swear (the degree in which this is enforced depends on the channel, but it's still usually a good idea to stay away from).
Basically, just use common sense. Anything that would be annoying to you is probably annoying to others, so don't do it
